Present perfect tense.

We use the present perfect ...

• To talk about something happeningat the moment of speaking

• To talk about something that happened in the past

• To talk about an action that started at some point in the past and continues in the present

• To talk about something that is going to happen in the future,

To form the present perfect we use the auxiliary "HAS/HAVE" + ..

• past simple

• past participle

• past continuous

• infinitive form

We use "HAS" with the subjects

• I-YOU-WE-THEY

• HE-SHE-IT

We use "HAVE" with the sujects

• I-YOU-WE-THEY

• HE-SHE-IT

We use ... to ask is something happened.

• Never

• Ever

We use ... to say that something has not happened.

• Never

• Ever

We use ... to say that something happened a short time ago.

• Already

• Yet

• Just

We use ... to say that something happened sooner than expected.

• Already

• Yet

• Just

We use ... in negative statements and questions.

• Already

• Yet

• Just

The correct work order for a question is:

• Have/has + (WH word) subject + past participle.

• Have/has + (WH word) subject + past simple.

• (WH word) Have/has + subject + past participle.