2013年职称英语考试语法指导:名词从句(4)
% [! @" R- ]4 P3 ?. W% x. q (2)whether和if的用法。 ' M, w" [. d2 a2 ?
①whether和if在宾语从句中可以互换,但是作介词宾语时连接词一般用whether。如: ; U+ _3 G( N( g1 I% v
It all depends on whether they will come back. / F# a) [" e7 l: N. Y4 W" Q
②后面直接跟or not 时用whether。如: + Y7 G1 n6 t2 L9 N
I didn’t know whether or not he had arrived in Wuhan.
5 t0 q. S2 S8 N- i: ]5 F5 u ③主语从句表语从句中只能用whether。如:
/ K# j$ q. h, Y$ X7 {: ]+ _5 t Whether the meeting will be put off has not been decided yet.
" g# c$ T. Q* U5 Y. K1 J5 [7 q The question is whether they have so much money. % o H( ^( `, Z" O2 h: D
④whether可以引导同位语从句,用以说明前面的名词的内容,if不能。如: ! X F1 v. F. B: f2 y
We ought to discuss carefully the question whether we can do it or not.
q/ i: a h) r" l4 c' w/ ? ⑤whether常与or连用表示一种选择,if不能这样用;whether也可与动词不定式连用但if不能。如:The question of whether they are male or female is not important.
* q1 S4 ?/ `. A i6 m S I have not decided whether to go or not. ( K, e: Y% F7 z
⑥间接引语位于句首时或者是间接引语提前时用whether不用if。如: www.Examw.com1 Y8 G0 P+ u/ l( P3 d+ m* \
Thank you, but whether I’ll be free I’m not sure at the moment. % \8 s8 w0 I+ ^5 C+ A5 W; Z6 [' b- t0 V+ S
⑦whether可引导一个让步状语从句表示“不管”、“无论”,而if不能。如:
+ {9 p y, M% ?; n' z% M8 D M Whether he comes or not, we will begin our party on time. |