Grammar: what's the difference between “past perfect tense" and "present perfect tense"？
What's the difference between “past perfect tense" and "present perfect tense"？
It's killing me!
could you answer me in easier words, and make some exmple, thanks!I finished my work in this morning.
I was finished my work in this morning.
I have finished my work in this morning.
Which one is correct？

Question

Grammar: what's the difference between “past perfect tense" and "present perfect tense"？
What's the difference between “past perfect tense" and "present perfect tense"？
It's killing me!
could you answer me in easier words, and make some exmple, thanks!I finished my work in this morning. 
I was finished my work in this morning.
I have finished my work in this morning. 
Which one is correct？

Answer

Past perfect = something that was completed before something else happened.

I had studied English before I went to Canada.

Present perfect = something happened before now

I have been to Canada.

That´s *basically* how it works. Check out these links for more detailed explanations: http://www.englishpage.com/verbpage/presentperfect.html
http://www.englishpage.com/verbpage/pastperfect.html

Answer

Here is a link that you can go in and look at the different tenses you are asking about and practice.

http://www.grammarbank.com/present-perfect-or-past-perfect.html

Answer

I finished my work in this morning.
I was finished my work in this morning.
I have finished my work in this morning.
Which one is correct？

Answers · 3

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