1.

break(window/cups/legs/out/record), 

improve(English/school performance/basketball skill),

finish(homework/housework/meal/school/speaking),

leave(home/me/it to me),  find(keys/out/me),  

yet,  already,  decide(to do/to go/to wear),  

try(to do/hard/again/my best), 

bring(luck to me/book with me/friends to party), 

forget(me/to clean/about work), 

return(home/to school/money).  

动词原形—过去式—过去分词: 

break—broke—broken, improve—improved—improved,  finish—finished—finished,  

leave—left—left,  find—found—found,  decide—decided—decided

try—tried—tried,  bring—brought—brought,  forget—forgot—forgotten,  

return—returned—returned.  

2.Grammar: 

Present perfect(negative form): 

subject+have/has not done+object

I haven’t ridden a bike.  

You haven’t written a book.  

He hasn’t seen me.  

She hasn’t flown a kite.  

We haven’t drunk water.  

They haven’t blown balloons.

3.

I have …………

I haven’t ………….

Have you ………….?

Yes, I have./No, I haven’t.

Which: Which ……… have you ………?

What: What ……… have you ………?

Who: Who have you ………?

Where and When: Where/When have you ………?

How: How often/much/many/long/far

4.

Have you ………. yet?

Yes, I have already ………./No, I haven’t ……… yet.

Has he/she ……… yet?

Yes, he/she has already ………….

No, he/she hasn’t ………….. yet.

5.

Hi, what happened to your legs?

I have broken my legs.

Lisa, I think your English is better than before.

Yes, I have improved my English.

Mike, it’s time to do your homework now!

I have finished my homework.

What time will your friend leave?

He has already left.

Tom, everyone is looking for your keys!

Don’t worry, I have already found them.

Did you decide which school to go?

No, I haven’t decided it yet.

Do you like diving?

I don’t know. I haven’t tried it yet.

Where is your sister?

I haven’t brought her here.

What is his name?

He told me once, but I have already forgotten.

Are you still in Kunming?

No, I have already returned to Beijing.