We consider Tom to be one of the best students in our class.
6 e- D: [1 l- z" B" r, v" c 我们认为汤姆是班上最好的学生之一。
2 G- D d) r' g- A) t7 c% S9 h4 O 典型例题 2 h% ~/ ^/ r" b J8 L2 _9 o. o
Charles Babbage is generally considered ___ the first computer.
1 {7 \, T2 N2 E( s A. to invent B. inventing C. to have invented D. having invented
' C6 |' I! b3 { 答案:A. 由consider to do sth. 排除B、D。. 此句只说明发明这一个事实,不定式后用原形即可。而C为现在完成时,发明为点动词一般不用完成时,且此处也不强调对现在的影响,因此不选C。
3 d _( r, c9 O8 f1 G% q 3) to be +形容词
( F O1 P& f' X0 V: I& h Seem, appear, be said, be supposed, be believed, be thought, be known, be reported, hope, wish, desire, want, plan, expect, mean… & Y" |4 x' H, ]+ Y. _: Y: E
The book is believed to be uninteresting. / k( y( M" h, L/ J5 V: u6 | r
人们认为这本书没什么意思。</p>
& \# b3 h0 u4 \% D, _' S# `8 d 4) there be+不定式 ) U* E Z; g* h) o/ C+ N
believe, expect, intend, like, love, mean, prefer, want, wish, understand
0 ]1 g9 M9 y2 X8 W' ? We didn’t expect there to be so many people there.我们没料到会有那么多人在哪里。
- T/ y$ c5 \* F) z, V( @ 注意 : 有些动词需用as 短语做补语,如regard, think believe, take, consider. \; q0 Y4 _8 [
We regard Tom as our best teacher. 我们认为汤姆是我们最好的老师。
2 m* a6 ?: X+ ]- Q; } Mary took him as her father . 玛丽把他当作自己的父亲。 - O0 o- }5 P H$ H; @ N+ S
3 、不定式主语
9 b& p; O5 |' t1 r3 X, } 1) It’s easy (for me) to do that.我做这事太容易了
" G# X( r! S0 J. `- i R) Q ]/ d easy, difficult, hard, important, possible, impossible, comfortable, necessary, better; the first, the next, the last, the best, too much, too little, not enough
. g8 E% ?: ]: [1 @! g7 f It’s so nice to hear your voice. 8 Y. c' i+ V, k' r' {9 L# {$ L
听到你的声音真高兴。 . p" o; m% z8 x' `- W# k1 N8 q
It’s necessary for you to lock the car when you do not use it.
$ U- a( a5 Q7 h# E 当你不用车的时候,锁车是有必要的。 ( G( c0 m# q# y/ Y: K0 M h
2) It’s very kind of you to help us. 他帮助我们,他真好。 " s* R' ~8 C2 `# f, Y- x
Kind, nice, stupid, rude, clever, foolish, thoughtful, thoughtless, brave, considerate(考虑周到的), silly, selfish(自私的) & X6 N8 ?7 ~+ x: K) R$ d8 n' o2 n
例句:
# A0 @5 ~+ L s* ? It was silly of us to believe him. 我们真愚蠢,竟然相信了他。
$ L( \* m* n; t It seemed selfish of him not to give them anything. 他不给他们任何东西,这显得太自私了。
0 P" W! z* q, J( S! L0 N5 g6 d- ?. ] 注意:1) 其他系动词如,look,appear等也可用于此句型
# u# |6 Y5 e" N3 e9 d0 {' C# X 2) 不定式作为句子成分时,动词用单数形式。 3 I# s6 a8 ?6 ]
3) 当不定式作主语的句子中又有一个不定式作表语时,不能用It is… to…的句型 0 H9 `. z; V0 v: E" H7 d* r
(对)To see is to believe. 百闻不如一见。
) P$ K- N) l+ e8 p. s1 w8 B' z- @ (错)It is to believe to see. / E3 j3 C' Q* v9 Z0 A7 t. h
4 、It’s for sb.和 It’s of sb.
5 Q! Z1 i$ K, d3 J5 y+ ` 1)for sb. 常用于表示事物的特征特点,表示客观形式的形容词,如easy, hard, difficult, interesting, impossible等:
; L, y4 X7 s6 l) k It’s very hard for him to study two languages. 对他来说学两门外语是很难的。
3 }9 s% r2 f7 Y/ z 2)of sb的句型一般用表示人物的性格,品德,表示主观感情或态度的形容词,如good, kind, nice, clever, foolish, right。 ) g+ y6 H9 _+ Z
It’s very nice of you to help me. 你来帮助我,你真是太好了。 for 与of 的辨别方法: $ Q/ G" n" A6 ^1 W$ t/ [
用介词后面的代词作主语,用介词前边的形容词作表语,造个句子。如果道理上通顺用of,不通则用for。如:
+ o4 u" S5 Z- N0 D You are nice. (通顺,所以应用of)。
0 p7 a+ I# D- C. I He is hard. (人是困难的,不通,因此应用for。) - p4 F' b( V3 y" X+ p
5 、不定式作表语
9 Y% Z l5 F8 Z: |% C 不定式可放在be动词后面,形成表语。例如:
1 x$ u6 H7 Z( o- Q1 r1 O9 v My work is to clean the room every day. |