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Produce large numbers of new plants vegetatively would require large numbers of
Produce large numbers of new plants vegetatively would require large numbers of
游客
2023-12-31
26
管理
问题
Produce
large numbers of new plants vegetatively would require large numbers of parent plants and correspondingly large tanks and floor space.
选项
A、To have producing
B、To be producing
C、To have been producing
D、To produce
答案
D
解析
(1)画线部分错误分析。
根据句意,Produce large numbers of new plants vegetatively为主语,谓语为would require,但是动词短语不能作主语。
(2)选项辨析。
四个选项虽均为不定式短语,但选项A形式不正确,B和C选项均为进行时态,不符合句意,因此选项D正确。
【知识拓展】(1)语法拓展:不定式的时态和语态。
①不定式的时态。
不定式的一般形式所表示的动作,通常与主要谓语所表示的动作(状态)同时(或几乎同时)发生,或是在它之后发生;若不定式所表示的动作,在谓语所表示的动作(状态)之前发生,这个不定式就要用完成式;若主要谓语表示的动作(情况)发生时,不定式表示的动作正在进行,这时不定式就要用进行式。
②不定式的语态。
当不定式逻辑主语是不定式中的动词的宾语时,不定式一般要用被动形式。
(2)拓展练习:试分析下列句子,注意不定式的时态和语态。
e.g.To improve hand-eye co-ordination,you should practise throwing and catching balls.
要想提高手眼协调能力,你应该练习投球和接球。
She never was known to have done a good action in behalf of anybody.
大家都知道她从来没有为别人出过力。
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