题目内容
7．He has already finished his homework．（改成否定句）Hehasn'tfinished his homeworkyet．
分析 --他已经完成他的作业了．
--他还没有完成他的作业．
解答 答案：hasn't；yet．考查否定句．根据has finished可知，是现在完成时态．变否定句has后直接加not．already要改为yet，用于句尾．答案是hasn't；yet．
点评 现在完成时态，由"have/has+过去分词"构成，否定句直接在have或has后加not．句中already要改为yet．此类题要结合语境，熟练掌握相关用法．
练习册系列答案
相关题目
17．These are the messages that Helen got yesterday．Read them carefully and find the best answers to the questions．
26．What's"Happy Feet"？C
A．A book．
B．A song．
C．A movie．
D．A pair of shoes．
27．What is Lucky？B
A．A kind of dog food．
B．A dog．
C．A cat．
D．Rover's friend．
28．Who asked Helen to buy something？C
A．Lisa and Jenny．
B．Jack and Chris．
C．Jack and Lisa．
D．Jenny and Chris．
| Helen， Happy Feet is on now at New Times Theater．Would you like to see it？ Chris | Helen， I'm going to have a birthday party next weekend．Can you come？ Jenny |
| Helen， Buy some milk and sugar on your way home． Thanks． Jack | Helen， I found a new brand of dog food．Rover just loves it．You should get some for Lucky! Lisa |
A．A book．
B．A song．
C．A movie．
D．A pair of shoes．
27．What is Lucky？B
A．A kind of dog food．
B．A dog．
C．A cat．
D．Rover's friend．
28．Who asked Helen to buy something？C
A．Lisa and Jenny．
B．Jack and Chris．
C．Jack and Lisa．
D．Jenny and Chris．
16．When the telephone rang，Tony a cartoon，（ ）
| A． | watched | B． | watch | C． | was watching | D． | has watched． |
17．---You mustn't swim here．Look at the sign．It____"No swimming"．
---Oh，I_______ notice it．Thanks for telling me．（ ）
---Oh，I_______ notice it．Thanks for telling me．（ ）
| A． | says； don't | B． | writes； don't | C． | says； didn't | D． | writes； didn't |