2013年职称英语考试语法指导:名词从句(4)" k1 x3 ~3 b; L" v' T; t+ a
(2)whether和if的用法。 / d: D. O6 ~# X" u- X9 K2 J
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: + v( A, b% O' n
It all depends on whether they will come back.
% ]% t' O1 e0 A7 B/ T ②后面直接跟or not 时用whether。如: 0 b; b" u q6 V4 X
I didn’t know whether or not he had arrived in Wuhan.
2 S1 B! g+ l4 w ③主语从句表语从句中只能用whether。如:
, K( k; U# P' I+ ^5 \ Whether the meeting will be put off has not been decided yet.
1 U2 R0 n9 ^2 h The question is whether they have so much money.
! f' v2 m, J' h( N+ P0 {( M& G 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:
1 J" A, Z# Y+ V We ought to discuss carefully the question whether we can do it or not.
4 l) v6 E9 ~; w! m8 F3 a5 r 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. ( [7 M4 y9 Q9 N
I have not decided whether to go or not.
: K' z/ `8 ^8 k 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.com7 q9 G; a' u. C: i9 W6 m" P8 f
Thank you, but whether I’ll be free I’m not sure at the moment.
+ ^% v6 z) u) D( n5 N Y( F ⑦whether可引导一个让步状语从句表示“不管”、“无论”,而if不能。如: 0 b5 c3 x8 {* e5 ] ~# y
Whether he comes or not, we will begin our party on time. |