for since: คุณกำลังดูกระทู้
Table of Contents
For – Since
English Grammar Rules
The use of FOR
We use For when we measure the duration – when we say how long something lasts.
For + a period of time
To measure a period of time up to the present, we use the present perfect tense and not the present tense.
- I have known her for a long time. (Correct)
I know her for a long time. (Incorrect) - I have lived here for ten years. (Correct)
I live here for ten years. (Incorrect)
The present tense with For refers to a period of time that extends into the future.
- How long are you here for? (Until when)
- How long have you been here for? (Since when)
In reality, we can use all verb tenses with For.
Uses of For Example sentence Verb Tense
They exercise for two hours every day. Present tense They are exercising for three hours today. Present continuous
He has lived in Moscow for a long time. Present perfect He has been living in Turin for three months. Present perfect continuous
I worked at the service station for five years. Past tense He will be in hospital for at least a week. Future tense
However, we don’t use For with expressions such as all day or all the time.
- I was there all day. (Correct)
- I was there for all day. (Incorrect)
The use of SINCE
Since gives the starting point of actions, events or states. It refers to when things began.
Since + a point in time (in the past), until now.
- I’ve been waiting since 7 o’clock.
- I have known him since January.
With since we use the present perfect tense or the past perfect tense.
- I here since 5 o’clock and I am getting tired.
- I since 5 o’clock and I was getting tired.
Since can also be used in the structure It has been + period of time + since.
- It has been two months since I last saw her.
- It has been three years since the last earthquake.
For vs. Since
Knowing when to use FOR and when to use SINCE is important. Therefore it is useful to look at a summary of the contrast between FOR and SINCE.
FOR to mention a specific period (or duration) of time.
SINCE to mention the starting point of a period of time
(continues to now).
I have been a doctor for fifteen years. (duration = 15 years)
I have been a doctor since 1992. (starting point = 1992)
She has been a mother for six months.
She has been pregnant since her first child was born.
My sister has lived in Frankfurt for nine months.
My sister has lived in Frankfurt since the beginning of March.
Both For and Since are most commonly used with the perfect tense – we don’t use these expressions in the present tense.
Correct Incorrect
I have learnt Russian for three years.
I learn Russian for three years.
They have taught geography since last year.
They teach geography since last year.
He has owned his dog since his cat died.
He owns his dog since his cat dies.
While we can use For in the simple past tense we can’t use Since
in the simple past tense. Since can only be used in the perfect tense.
Correct
Incorrect
She went to Japan for three years. She went to Japan since 2003.
I studied in New Zealand for one month. I studied in New Zealand since one month.
He walked his dog for four hours. He walked his cat since four hours.
It should be remembered that both For and Since have other meanings in English that are not associated with time.
- This is for you.
- Is this the train for London?
- Since you asked, I’ll say yes.
- Since he didn’t study he didn’t pass the exam.
Summary Chart
Next activities
Would you like to play a game to practice the difference between For and
Since? Then try this Game.
See our For vs. Since English Lesson as a part of our free course.
Download our free For vs Since Worksheet (in PDF).
You can check the answers to this worksheet here: Answers to the For vs Since Worksheet.
If you found this grammar guide about the difference between For and Since in English useful, let others know about it:
[Update] When to use For and Since in English | for since – NATAVIGUIDES
For – Since
English Grammar Rules
The use of FOR
We use For when we measure the duration – when we say how long something lasts.
For + a period of time
To measure a period of time up to the present, we use the present perfect tense and not the present tense.
- I have known her for a long time. (Correct)
I know her for a long time. (Incorrect) - I have lived here for ten years. (Correct)
I live here for ten years. (Incorrect)
The present tense with For refers to a period of time that extends into the future.
- How long are you here for? (Until when)
- How long have you been here for? (Since when)
In reality, we can use all verb tenses with For.
Uses of For Example sentence Verb Tense
They exercise for two hours every day. Present tense They are exercising for three hours today. Present continuous
He has lived in Moscow for a long time. Present perfect He has been living in Turin for three months. Present perfect continuous
I worked at the service station for five years. Past tense He will be in hospital for at least a week. Future tense
However, we don’t use For with expressions such as all day or all the time.
- I was there all day. (Correct)
- I was there for all day. (Incorrect)
The use of SINCE
Since gives the starting point of actions, events or states. It refers to when things began.
Since + a point in time (in the past), until now.
- I’ve been waiting since 7 o’clock.
- I have known him since January.
With since we use the present perfect tense or the past perfect tense.
- I here since 5 o’clock and I am getting tired.
- I since 5 o’clock and I was getting tired.
Since can also be used in the structure It has been + period of time + since.
- It has been two months since I last saw her.
- It has been three years since the last earthquake.
For vs. Since
Knowing when to use FOR and when to use SINCE is important. Therefore it is useful to look at a summary of the contrast between FOR and SINCE.
FOR to mention a specific period (or duration) of time.
SINCE to mention the starting point of a period of time
(continues to now).
I have been a doctor for fifteen years. (duration = 15 years)
I have been a doctor since 1992. (starting point = 1992)
She has been a mother for six months.
She has been pregnant since her first child was born.
My sister has lived in Frankfurt for nine months.
My sister has lived in Frankfurt since the beginning of March.
Both For and Since are most commonly used with the perfect tense – we don’t use these expressions in the present tense.
Correct Incorrect
I have learnt Russian for three years.
I learn Russian for three years.
They have taught geography since last year.
They teach geography since last year.
He has owned his dog since his cat died.
He owns his dog since his cat dies.
While we can use For in the simple past tense we can’t use Since
in the simple past tense. Since can only be used in the perfect tense.
Correct
Incorrect
She went to Japan for three years. She went to Japan since 2003.
I studied in New Zealand for one month. I studied in New Zealand since one month.
He walked his dog for four hours. He walked his cat since four hours.
It should be remembered that both For and Since have other meanings in English that are not associated with time.
- This is for you.
- Is this the train for London?
- Since you asked, I’ll say yes.
- Since he didn’t study he didn’t pass the exam.
Summary Chart
Next activities
Would you like to play a game to practice the difference between For and
Since? Then try this Game.
See our For vs. Since English Lesson as a part of our free course.
Download our free For vs Since Worksheet (in PDF).
You can check the answers to this worksheet here: Answers to the For vs Since Worksheet.
If you found this grammar guide about the difference between For and Since in English useful, let others know about it:
British Food . Learn English
Learn about traditional British food. When learning a language it is also important to learn about the culture of the country which the language is from.
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Phân biệt SINCE và FOR
DelfinEnglish TagQuestion English EnglishStudy Education SINCE FOR
Giảng viên: Nguyễn Huyền Minh
Trung tâm Tiếng Anh Delfin English (TIẾNG ANH CÁ NHÂN HÓA)
TIẾNG ANH CÁ NHÂN HÓA Phương pháp học tiếng Anh phù hợp với trình độ và cá tính mỗi học viên. Giúp học viên phát huy thế mạnh và xây dựng niềm đam mê với tiếng Anh.
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Các khóa học tại Delfin English:
Tiếng Anh Cá nhân hóa THCS
Tiếng Anh dành cho học sinh Tiểu học
Đồng hành và củng cố Tiếng Anh
Tranh biện và thuyết trình bằng Tiếng Anh
Đọc viết phản biện bằng Tiếng Anh
The Present Perfect Tense in English | Structuring Sentences
The present perfect is formed, in the affirmative, as follows
Subject + have + past participle + object.
I + have + climbed + the mountain!
Example: have climbed the mountain!
The past participle is, often, the same as the past simple form of the verb (although not always so be sure to learn them!), except it has a different function here. The auxiliary verb is the one linked to the subject; the past participle simply denotes the action while the I have…, You have…, etc. denotes who had the experience.
Conjugating the Present Perfect (affirmative)
I have climbed the mountain
You have climbed the mountain
He/She has climbed the mountain
We have climbed the mountain
They have climbed the mountain
As is quite common in English, all these conjugations are the same except for one: the third person. One must be careful to remember this exception. Apart from this, the present perfect is quite simple; now you can go forth fully equipped to brag about your experiences in any conversation!
Forming the Present Perfect (negative)
The present perfect (negative) is formed as follows:
Subject + have + not + past participle + object.
We + have + not + eaten + Thai food.
We have not eaten Thai food.
Conjugating the Present Perfect (affirmative)
I have not eaten Thai food
You have not eaten Thai food
He/She has not eaten Thai food
We have not eaten Thai food
They have not eaten Thai food
It is important to keep in mind the order of the various parts of these phrases. Remember always that the negation (not) goes between the auxiliary verb and the past participle.
We can also employ a contraction here which will make conversation easier. In this case there are two contractions to be learned
have not ⇒ haven’t
has not ⇒ hasn’t
With our newly learned contractions, the conjugations become
I haven’t eaten Thai food
You haven’t eaten Thai food
He/She hasn’t eaten Thai food
We haven’t eaten Thai food
They haven’t eaten Thai food
Forming the Present Perfect (interrogative)
The present perfect (interrogative) is formed as follows
Have + subject + past participle + object?
Have + you + visited + South Carolina?
Have you visited South Carolina?
Conjugating the Present Perfect
Have I visited South Carolina ?
Have you visited South Carolina ?
Has he/she visited South Carolina ?
Have we visited South Carolina ?
Have they visited South Carolina ?
Again, we can add negation in order to affect emphasis. For example
Robert: Do you know much about Elvis Presley?
John: Haven’t I visited Memphis?
John answers Robert’s question with another question, which he believes should suffice as an answer. In this case, John means that he indeed knows much about Elvis Presley and has even visited his home in Memphis.
With the negation (and contraction), our interrogative conjugations become:
Haven’t I visited Memphis?
Haven’t you visited Memphis?
Hasn’t he/she visited Memphis?
Haven’t we visited Memphis?
Haven’t they visited Memphis?
FOR SINCE DURING – How do I use these words? Step-by-step
FOR | SINCE | DURING English grammar
FOR SINCE and DURING can easily be confused. Let’s take a look together at these three words stepbystep.
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