often_not ro touch the poisonous chemicalsa.does Peter warn us b.Peter warns us为什么选B不选A 还有Often 在句子中做的什么成分
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often_not ro touch the poisonous chemicalsa.does Peter warn us b.Peter warns us为什么选B不选A 还有Often 在句子中做的什么成分
often_not ro touch the poisonous chemicals
a.does Peter warn us b.Peter warns us
为什么选B不选A 还有Often 在句子中做的什么成分
often_not ro touch the poisonous chemicalsa.does Peter warn us b.Peter warns us为什么选B不选A 还有Often 在句子中做的什么成分
Often在句中作频率副词,提前时句子不需要部分倒装.
相当于Peter often warns us not ro touch the poisonous chemicals,often 作为一个频度副词,就是warn sb. not to do sth.
often是一个频率副词,在句子中作时间状语。通常情况看到句中有频率副词,该句通常使用一般现在时,而Peter是一个人名,作主语。谓语动词要使用第三人称单数形式,也就是说动词要加-s.那就是为什么选B不选A的理由。
本题应该选倒装的 A 项,选择 B 项是错误的。解析如下——
一、主谓是倒装有一定的要求,主要包括以下几个方面:
1、疑问句词前置,如:
* (What) does Peter warn us?彼得提醒我们注意什么?
* (When) do you set off? 你什么时候动身?
2、含有否定词的部分前置 (never...
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本题应该选倒装的 A 项,选择 B 项是错误的。解析如下——
一、主谓是倒装有一定的要求,主要包括以下几个方面:
1、疑问句词前置,如:
* (What) does Peter warn us?彼得提醒我们注意什么?
* (When) do you set off? 你什么时候动身?
2、含有否定词的部分前置 (never, hardly, no sooner, little, not a, neither, nor, not until, only 等),如:
* (Not until I entered the classroom) did the teacher ask me why I was late. 我进了教室老师才问我为什么迟到了。
* (Hardly) had I reached home when it started to rain. 我刚一进家天就下起雨来。
* (No sooner) had the boy said sorry to her than he remember what she had treated him before. 郍孩子刚一向她道歉就记起来过去她是如何对待自己的。
* (Only with the help of his children) did he manage to pull himself together. 只因得到了孩子们的帮助他才振作起来。
3、与介词同形的小品副词前置(up, down, in, out, over 等),如:
* (Over) is a bird flying. 一只鸟正急速飞过去。 (A bird is flying over.)
* (Down) drops a stone. 一块儿石头突然掉了下来。(A stone drops down.)
4、不包括 sometimes 在内的频度副词前置 (often, always, seldom, requently, usually 等)。如:
* Always have you been my close friend. 你一直是我亲密的朋友。
* Often Peter warns us not ro touch the poisonous chemicals
二、often 是副词,用作状语,说明谓语动词的动作频度,在句子中可以出现在下面的三种不同的位置:
1、中位:一般用于动词之前,be 和助动词之后, 如:
* He is often at home. 他经常在家。
* We often go there.
* We have often been there.
2、末位:用于句末以加强语气。如:
* We haven't been there very often.。
3、首位:放在句首强调动作发生的频度。主谓要求倒装。如:
* Often had I intended to speak of it. 我常想说说这件事。
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