THE PRESENT PERFECT TENSE

Use the present perfect tense to talk about happenings in the past that explain or affect the present. The verbs have and has are used as “helping” or auxiliary verbs to form the present perfect tense. For example:

Sam has scored two goals.

I’ve just finished my shower.

Uncle Tom has lost his wallet.

John has gone out.

The Lees have moved to Ohio.

It has not rained for months.

Have you found your keys yet?

Tim has made two spelling mistakes.

They have opened a new shop.

It’s been very wet today.

Kim’s cut her finger.

NOTE:

To form the present perfect tense join have or has to the past participle of the verb:

have + past participle

has + past participle

The past participle of a regular verb usually ends in -ed, just like the simple past tense. But the past participles of irregular verbs don’t follow this rule.