present perfect tense

what is present perfect tense with examples

Present Perfect tense is used to express :

a. An action just finished:

I have done my duty.

He has written a letter.

b. A past action the result of which is still going on:

He has finished his work.

c. An action begun in the past but not yet completed:

He has served in the school for ten years (He is still serving).

d. A future perfect' action when preceded by when, before, after, as soon as etc :

I shall return when I have finished the work.

Note : Present Perfect Tense form of some verbs like go, come, set, rise etc. is sometimes formed with the verb 'be': He is gone. The sun is set.