鞏固練習：

　　I.按要求轉換下列各句，每空一詞。

　　1、He has already finished his homework.(改為否定句)

　　He _______ finished his homework ________.

　　2.They have found the lost books already.(改為一般疑問句，并作否定回答)

　　______ they _______ the lost books _______?No，they________.

　　3.Julia has not got home from school yet.(改為肯定句)

　　Julia ______ _______ ________ home from school .

　　4.You have never been to Shanghai before，_________ _________ ?(改為反意疑問句)

　　5. He’s gone to Beijing, ______ ______?(改為反意疑問句)

　　6.Mr Wang began to teach English in this school in 1999.(改為同義句)

　　Mr Wang _________ _________ English in this school since 1999.

　　7. He hasn’t left home for 3 days.(同義句)

　　He _____ ______ ______ home for 3 days.

　　8. They have lived here since 3 years ago. (對劃線提問)

　　II.選擇正確答案。

　　( )1.—Who is Mary ?

　　—____?I saw you talking with her at the meeting .

　　A.Don't you meet her yet

　　B.Didn't you met her yet

　　C.Haven't you met her yet

　　D.Hadn't you met her yet

　　( )2.—How do you like Beijing ，Mr Black?

　　—Oh ，I ____ such a beautiful city .

　　A.don't visit

　　B.didn't visit

　　C.haven't visited

　　D.hadn't visited

　　( )3.The old people ____ lonely at all since we began to visit them once a week.

　　A.don't feel

　　B.hasn't felt

　　C.haven't felt

　　D.didn't feel

　　( ) 4.We have lived here ____ five years ago.

　　A.when

　　B.since

　　C.before

　　D.after