present perfect tense!!!

have/has + past participle
要有just, ever, yet, for, since& never
e.g. He has just finished his meal.
Have you ever been to China?
Have you done your homework yet?
She has worked here for 10 years.
She has worked here since 2005.
I have never been to Japan.

Remember the basic structure: have done something
1. He/She/It has done something.
2. I/We/They/You have done something.

------

Past participle (or pp) = the third column of your verb table, e.g.
do, did, *DONE*
go, went, *GONE*
drink, drank, *DRUNK*

But some "pp" are the same as the present tense, e.g.
put, put, *PUT*
become, became, *BECOME*
run, ran, *RUN*

------

This tense is used to suggest something in the past still has an effect on the present. Here are some examples.

1a. I have just finished my homework. (just = 剛剛)
1b. I have finished my dinner just now. (just now = 剛剛)

2a. I have ever been to Macau. (ever = 曾經)
2b. I have never been to Europe. (never = 從未)

3. Geraldine, have you bought the vegetables for dinner yet? ("yet" is used in question)

4a. I have worked for Toastmasters for 9 years. (have done sth + for a period)
4b. I have worked for Toastmasters since 2006. (have done sth + since a time)

5a. I have completed the project (already). (have done sth + already)
5b. I have not completed the project (yet). (have not done sth + yet)
Words in bracket can be omitted.

6. I have recently (最近) used the free homework service at [email protected]! The tutor answered questions in English, Maths and Science free of charge.