Present perfect tense

Present perfect tense is used to indicate for  action occurred in the past but completed in the present tense. It means that an action was started in the past but completed at the time of expression. Therefore, while expressing present perfect tense, fix time’s expressions are generally omitted.

Has, have, and past participle or base + ed.

To construct present perfect tense, auxiliaries have and has are used to express complete sense of action.

•I have already completed my assignment.

•We have decided to launch new plan of action.

•They have visited Ajantha caves twice this year.

•She has cracked her exam with distinction.

•She has achieved this feat many times in her life.

•He has already finished his job.

•He has beautifully played in the final match.

•It has rained heavyily since morning.

‘Have” auxiliary verb is used for the plural subject; whereas, “has” is preferred for singular subject. Besides, third form of verb(or past participle of the main verb) is taken to express complete action.

•I have already completed my assignment.

•We have decided to launch new plan of action.

•They have visited Ajantha caves twice this year.

•She has achieved this feat many times in her life.

•He has already finished his job.

Already, so far, and yet

“Already time adverb” is used when the action is completed well before at the time of expression.

•He has already completed his daily homework.

•They have already explained this point twice.

•She has already taken her maiden chance.

•This pesticides have already banned for commercial use.

When the action is just completed at the time of expression, then, “so far time’s adverb” is generally placed at the beginning or at the end of the sentence.

•They haven’t met us so far.

•So far, they have consolidated theirs position for further action.

•So far, he hasn’t mentioned anybody’s name.

For the negative expression or for the incomplete action, “yet” time’s adverb is preferred.

•The construction work hasn’t completed yet.

•I haven’t received my money yet.

•He hasn’t shown any sign of improvement yet.

For, since, just now

In the present perfect tense, to describe experience, “For” is used to express period of time and “Since” is preferred to express point of time.

•I have lived in mountainous region for 5 years .

•I have used the same bike for 10 years.

•He has lived in hostel since 10th class.

•We have received a lot of rain since June.

•He has been so upset since morning.

In case of action just completed, “Just now” is taken. It means that action has been completed just before at the time of expression.

•Don’t force me. I have just taken my dinner.

•I have just enquired about trains arrival.

•We have just discussed on this issue.

General time or without definite time period

Here, there is no need for the time expressions to express the present perfect tense.

•He has learned presentation skills.

•She has joined in the environmental campaign.

•They have mastered english language.

•You have confused me.

•I have borrowed thousand rupees.

Apart from this,  through different forms of sentences, such as, negative and interrogative sentence, we can also describe the present perfect tense. No doubt, the ambit of perfect present is too vast to cover. Hopefully, this relevant knowledge will definitely help you in your learning endeavour.

Simple present tense and use

Use of adverbs

Elements of argument

Subordinating conjunctions

Adversative coordinating conjunctions

Relative pronouns

Explanation of cumulative conjunction

Coral reef ecosystems

WTO and trade war

https://www.youtube.com/channel/UCTkyAZY15L6UOEUl3y85XYw/