不定式还可以充当句子的宾语,但有些动词,如find,think,believe 等,在语法上不能接受不定式作宾语,只有用it作形式宾语,从而把动词不定式置于句尾。这样的不定式可继续充当其宾语的作用。
如: I found it difficult to fall asleep.我发现很难入睡。
还有一点:动词不定式,还可用在how,when,where,what,which 等疑问代词或副词之后,与其共同作宾语。如:I don't know how to use a computer.我不知道怎样使用电脑。Remember?
too...to...和enough...to:too...to表达太 ... 一致于不能...。
enough ... to 表达 足以...。这两个词组的用法用两个例子就可以说清楚了。
The box is too heavy for me to lift.这个箱子太沉了,我提不动。
He is old enough to go to school.他到上学的年龄了。也就是说,他的年龄足够上学了。记住这两个句子就可以举一反三,应用自如。你记住了吗?
好吧,再试一把趁热打铁!
练习:
1. Tell him ___ the window.
A. to close not
B. not to close
C. to not close
D. not close
2. Paul doesn't have to be made ___. He always works hard.
A. learn
B. to learn
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