归纳:
n 在主语 + 宾语 + 宾语补足语结构中,当宾语是动词不定式或句子时,要用it作形式宾语,将动词不定式或句子移到句子的后面去。
n 考试时,判断要不要 it,主要看句子后面有没有动词不定式或句子,若有,要选 it
n 宾语、宾语补足语倒装:当宾语较长,宾语补足语较短时,为了句子结构均衡,往往采用倒装,这里不存在it的使用问题, 对下句作出判断:
The development of ultrasound has made ______ early diagnosis of some fatal diseases.
A. it possible B. possible
C. it is D. it
该题的正确答案应为B,因为句子采用了倒装形式,原结构为:
The development of ultrasound has made [early diagnosis of some fatal diseases] possible.
宾语 补足语
3) 记住以下短语:
to takeas to think ofas
to regardas to refer toas
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