选修八Unit 5 Meeting your ancestors

Grammar & Writing

[知 识 梳 理]　　　　　　　　　　　　　　　　　　　　　　

观察感悟(源于教材)

Ⅰ.复习现在完成进行时

1．We ____________(excavate)here for many years and...

2．We ____________(excavate)layers of ash almost six metres thick，which suggests that they might have kept the fire burning all winter.

3．Well，we ____________(find)the bones of tigers and bears in the caves，and we think these were their most dangerous enemies.

4．Since the famine broke out，the number of people dying of starvation____________(increase)．

5．How long ________ you ________ (drive)，Mrs Smith?

答案　1.have been excavating　2.have been excavating　3.have been finding　4.has been increasing　5.have；been driving

Ⅱ.单句语法填空

1．-Excuse me，which movie are you waiting for?

-Dangal.We ________(wait)here for more than two hours.

2．-Where is Peter？I can't find him anywhere.

-He went to the library after breakfast and ________(write)his essay there ever since.

3．Marty________(work)really hard on his book and he thinks he'll have finished it by Friday.

4．He dropped out due to his illness.He ________(consider)coming back since last year.

5．They ________(discuss)the problem without interruption for about two hours.

答案　1.have been waiting　2.has been writing　3.has been working　4.has been considering　5.have been discussing

Ⅲ.完成句子

1．She ______________(工作了)here for three years till now.