Module 9 Friendship
模块语法专练
whether/if及疑问词引导的宾语从句
1.whether/if引导的宾语从句。
(1)whether/if引导宾语从句时,意为“是否”,表示不确定的概念,常位于ask,see,say,know,find out等词或短语后面。一般情况下,两者可互换,在口语中多用if。例如:
He asked if/whether they needed some help.他问他们是否需要帮助。
(2)whether和if的区别。
①在动词不定式之前只能用whether。例如:
I can’t decide whether to stay.我不能决定是否留下。
②在固定结构“whether...or not”中,只能用 whether。例如:
I want to know whether it’s good news or not.我想知道它是否是个好消息。
③在介词后只能用whether。例如:
His father is worried about whether he may lose his job.他的父亲担心他是否会失去工作。
2.疑问词引导的宾语从句。
(1)由特殊疑问句充当宾语从句时,该从句由特殊疑问词引导,此从句要用陈述句的语序。例如:
I don’t know when the plane flies.我不知道飞机什么时候起飞。
(2)当宾语从句由连接副词或代词when,where,who,why,which,what,whose等引导时,有时可以改为由“疑问词+动词不定式”构成的不定式短语,使宾语从句转化为简单句。但前提是主句的主语与从句的主语一致或主句的宾语是从句的主语。例如:
Can you tell me how I can get to the bus stop?
→Can you tell me how to get to the bus stop?你能告诉我怎样去公交车站吗?
Ⅰ.单项填空
(C)1.—I wonder .
—Yes,of course.
A.where we can buy the parts
B.how often you hear form your sister
C.if I may have a word with you
D.why he arrived late yesterday
(A)2.—What did he ask just now?
—He wondered .
A.if they would meet at the school gate
B.when would they start
C.that they would take some food
D.how they will get there
(D)3.I wonder the idea to Daming.He still looks angry.
A.ifhave you mentioned
B.whathave you mentioned
C.what you have mentioned
D.if you have mentioned
(B)4.—Do you know we will arrive at your home town?
—This afternoon.
A.why B.when
C.if D.where
(C)5.My grandmother always asks me .
A.why can she use the iPad
B.how can she use the iPad
C.how she can use the iPad
D.when can she use the iPad
