for and since: คุณกำลังดูกระทู้

[NEW] Since vs For Exercises | for and since – NATAVIGUIDES

SINCE vs FOR Difference | Use in English with Examples

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QUIZ: https://shawenglish.com/quizzes/sincevsforenglishgrammarquiz/
Since For use and know the difference with English examples.
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The Present Perfect Tense in English | Structuring Sentences

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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?

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CIP Online : Phân biệt khi sử dụng For và Since

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We are going to learn about For and Since to help our students understand their differences.
For
For is used with the period of time.
Example:
For 3 months
For ten years

Let’s have two example sentences and see which one is correct.
I have been studying English since six months.
I have been studying English for six months.
The correct sentence is, I have been studying for six months.
Let’s go now to Since
Since
Since is used with a starting point.
Example:
Since Monday
Since June 2015

Let’s have two example sentences and see which one is correct.
I have been studying in New York for April.
I have been studying in New York since April.
The correct sentence is, I have been studying in New York since April.
Check our website
https://online.cipenglish.com

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When to Use the Present Perfect Tense | With example sentences

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The present perfect tense connects the past with the present. When using this verb tense, we can be talking about an action or event that occurred in the past but will be referring to how it relates to the present. We use the present perfect when describing certain life experiences.
Imagine that you and your friends are at university and you’ve just come back to campus from the summer vacation; you are all very excited to tell your friends about your amazing internships or the beautiful places you went or the wonderful times you had with your family. One member of the bunch says, This summer I hiked Mt. Everest. Not to be outdone, you might say, I have climbed Mt. Everest and several other high peaks. Again, we use the present perfect to describe actions and events which occurred in the past, which are also of particular importance in the present moment.
Examples:
I have boated on three of the world’s longest rivers.
We have never sailed the Atlantic Ocean.
Lance Armstrong has won the Tour de France multiple times.
Jessie has been to Disneyworld seven times.
2 To describe changes over a period of time
We can also use the present perfect to describe events which occurred gradually and over time in the past, especially when these had a lasting influence on the present.
As a further example, imagine that you’re low on petrol (gas in American English) and you stop to refuel. You notice that the gallon/litre has become very expensive recently and exclaim, Gas prices have really risen lately! Or, to provide another example, imagine you have an aunt you haven’t seen in some years. When you do see her again after about 10 years and she has become rather fat, you may say, Wow, Auntie, you have gained weight! Keep in mind, however, these are just grammar concept explanations and not a guide for how to maneuver family reunions.
Examples:
Jeffrey’s Spanish has improved since we spoke last.
Erica’s heart has recovered from the illness.
Timmy’s grades have worsened since last year.
Our house’s value has gone up recently.
3 To describe accomplishments
Accomplishments, especially big ones, usually have a lasting influence on the present; we use the present perfect to describe and relate these accomplishments and milestones.
Examples:
The United States has sent humans to the moon.
The national GDP has grown by 3.2 percent!
Ireland has won freedom!
Grandma has perfected her cornbread recipe.
A continuing action that started in the past
Actions or events that are still occurring, but which began in the past, also require the use of the present perfect.
While this type of situation often involves describing an accomplishment as well, it doesn’t have to, nor does it even have to be positive in nature. Imagine you were stuck on an island all alone without any personal items for a very long time, and one day, exasperated, you said to yourself, I have lived on this deserted island for six years. This would hardly be a positive situation; unless, of course, you enjoy solitude, in which case you probably go back to your cave and play with the pet parrot you’ve adopted.
Examples:
Jessie has played guitar for ten years.
Emma has been a carpenter for a long time.
Jim and Hank have worked at the newspaper for almost their entire lives.
I have stayed awake for 13 hours.

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Present Perfect | Fun English Grammar Lessons | Learn English

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Learn all about the Present Perfect Tense with examples. Get the transcripts: https://bit.ly/3awajHB
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