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人教新目标版八年级上册 Unit 9 单元同步语法精讲及语法强化训练题 单元同步语法精讲 (一)情态动词can 1．含义：情态动词can表示说话人的语气或情态，基本意思是“能；会”，没有人称和数的变化，在句子中不能常独作谓语，其后须跟实义动词原形；can的否定形式为can
not/can't/cannot；过去式为could，其过去否定形式为could
not/couldn't。 2．can的用法
①表示能力，意为“能；会”等。 —Can
you speak English？你会讲英语吗？ —Yes，I
can.是的，我会。 ②多用在口语中，表示请求或允许，意为“可以；能”等。用于疑问句中表示提出要求；用于否定句中表示不允许。 【注意】can表示请求，用于发出邀请，如果接受对方的邀请，常用Sure，I'd
love(like)to./Certainly/Of course.等来回答；如不接受，常用Sorry等来有礼貌地拒绝。一般情况下需要说明不能接受邀请的原因以表示歉意。 eg：—Can
you come to my birthday party tomorrow？明天你能来参加我的生日聚会吗？ —Sorry，I
am afraid not.I'm going to visit my grandpa.对不起，我恐怕不能去，我打算去看望爷爷。 (二)have
to的用法 “have
to”意为“不得不，必须”，它强调一种客观情况，有单、复数及时态的变化，其第三人称单数为has to，过去式为had
to。 eg:
His mother is ill.He has to stay at home and look after her.他妈妈病了。他不得不待在家里照顾她。 have
to 与must的区别：
①have to意为“不得不；必须”，它强调一种客观情况。must意为“必须”，着重于说话人主观上认为有义务、有必要。 eg:
We have to go home now because it's dark.我们现在必须回家因为天黑了。 You
must do it yourself.你必须自己做。 ②have to 有单复数及时态的变化，must无人称、时态、数的变化。 语法强化训练题 一、单项选择。 1．—________I
have some bananas? —Yes，please.
A．Can B．Need C．Must D．Should 2．—Can
you come to Susan's party? —Sorry，I________look
after my grandma. A．am B．have to C．can D．do 3．—Can
you come and play baseball games with us? —________.I
must study for a test. A．Yes，I
can B．Yes，I
do C．I am afraid not D．Sure，I'd
love 4．—Will
you go to museum with me this afternoon? —Sorry，________.My
aunt is coming to see me. A．I
don't B．I can't C．I
mustn't D．I am not 5．—________you
come to my party on Sunday? —Sure，I'd
love to. A．Must
B．Can C．Should D．Need 二、按要求完成句子。 6．They
can go to the tennis game.(改为一般疑问句) ________
________go to the tennis game? 7．Can
you play soccer with me this afternoon？(作肯定回答)
Sure，________
_______ ________. 8．Can
she go there by taxi？(作否定回答)
No，________
________. 9．He
has to go_to_the_doctor．(对画线部分提问)
________
________he have to________？ 10．They
can come to our school on_Tuesday．(对画线部分提问)
________ ________they come to your school? 答案： 一、1----5 ABCBB 二、6.
Can they 7. I'd love/like
to 8. she can't 9. What does do 10. When can |
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