Mastering Present Perfect Tenses

will eat

ate

have eaten / has eaten

eating

have/has + been + present participle

have/has + been + base form

have/has + being + present participle

have/has + been + past tense

I have not still finished my homework.

I still have finished my homework.

I have finished my homework still.

I have still not finished my homework.

I will work on this project next month.

I have been working on this project since last month.

I have been working on this project yesterday.

I worked on this project last month.

Present perfect focuses on completed actions; present perfect continuous emphasizes ongoing actions.

Present perfect focuses on ongoing actions; present perfect continuous emphasizes completed actions.

Present perfect is used for future actions; present perfect continuous is for past actions.

Present perfect indicates actions that will happen; present perfect continuous is for hypothetical situations.

I had not visited Paris.

I have not visited Paris.

I have visited Paris.

I will not visit Paris.

I will study English next month.

I studied English last year.

I have studied English for two weeks.

I have been studying English for five years.

I visited the Grand Canyon last year.

I have visited the Grand Canyon on my recent trip.

I will visit the Grand Canyon on my recent trip.

I am visiting the Grand Canyon next week.

I have studied for my exams, and I still study.

I have been studying for my exams, and I am still studying.

I am still studying for my exams yesterday.

I have been studying for my exams, but I am not still studying.

Subject + has + not + verb + object.

Subject + have + past participle + not.

Subject + have/has + not + past participle.

Subject + not + have + past participle.