Present Perfect

 The present perfect

The form of the verb used for actions or events that have been completed or have happened in a period of time up to now:

The sentences "She has talked to her doctor about the problem" and "I have never been to Australia" are all in the present perfect.

 Fewer examples

• 'I have seen it' is an example of the present perfect.
• The sentence 'I have told him' is in the present perfect tense.

 SMART Vocabulary: related words and phrases

Grammar

Completed or continuing events

We use the present perfect simple with action verbs to emphasise the completion of an event in the recent past. We use the present perfect continuous to talk about ongoing events or activities which started at a time in the past and are still continuing up until now. …

Mental process and sense verbs

Some verbs are not used very often in the continuous form. …

Present perfect: typical errors

We don’t use since with periods of time: …

Past simple or present perfect?

Past simple = I worked Present perfect = I have worked …

Present perfect continuous (I have been working)

We use have/has + been + the -ing form of the verb. …

Present perfect continuous: form

We use have/has + been + the -ing form of the verb. …

Present perfect continuous: uses

We use the present perfect continuous to talk about a finished activity in the recent past. Using the present perfect continuous focuses on the activity. …

Present perfect simple (I have worked)

We use have/has + the -ed form of the verb. …

Present perfect simple: form

We use have/has + the -ed form of the verb. …

Present perfect simple: uses

We use the present perfect simple to refer to events in the past but which connect to the present. …

Present perfect simple or present perfect continuous?

We use the present perfect simple with action verbs to emphasise the completion of an event in the recent past. We use the present perfect continuous to talk about ongoing events or activities which started at a time in the past and are still continuing up until now…

Referencias:

the present perfect. (2023). https://dictionary.cambridge.org/dictionary/english/present-perfect 

Learn English by Pocket Passport. (2019, 4 enero). Present Perfect | Fun English Grammar Lessons | Learn English [Vídeo]. YouTube. https://www.youtube.com/watch?v=fXN8hY0WwGg