补全后的比较分句是:Do exercise as often as it is required that you should (do). as作为比较代词,替代了频度副词aften,在that从句中作频度状语。
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少数介词可以后接介词短语作宾语。典型的介词是 from。例如 from behind the door, from under the bed. 但网友但这个句子中但 along 并不是介词,而是副词,意为 forward 向前。
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不定式作表语,如果主语部分含有实意动词do, 则作表语的不定式的to通常省略(也可不省略)。本句中的give为不及物动词,《朗文》类似例句如下:Most people are willing to give to charity. The situation is now desperate, so please give generously.
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① Water is to fish what air is to man.  ② Water is to fish as air is to man.  ③ As air is to man, so is water to fish.  ④ What air is to man, that water is to fish.这四个句子如何分析结构,我曾经提出过类似的问题供老师们分析,但结果没有令我满意而关闭了问题。对于类似结构以前也有不少分析...
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which的先行词为不定式to use chopsticks. gradually为become的方式状语,说明句子表达的是become的过程,即动作本身,而不是动作的结果。所以用一般过去时更为符合句义。一般过去时的动作通常需要一个确切的过去时间状语,但这个定语从句暗示了过去时间状语,即a long time ago之后的那段很长的时间。
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Collecting, by occupying spare time so constructively, makes a person contented, with no time for boredom.content作为表语形容词,可以后接with介词短语作补足语,表示对什么感到满意或满足。也可以不用with介词短语,仅仅表示主语感到满意、满足,不提及对什么感到满意或满足。传统语法称with介词短语是修饰形容词...
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当现在进行时态没有将来时间状语,或时间状语为now时,不属于进行体表示将来,而是进行体的普通用法。进行体表示将来的前提是必须有将来时间状语。例如:It is getting dark now. The old man is dying now. 这二个句子都不能说是进行体表示将来。now明确告诉你说话人是在说现在。He is leaving next week. 这才是进行体表...
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We choose this hotel because the price for a night here is down to $20, half of_________it used to charge.A.that          B.which         C.what        D.how介词 of 后必须接名词或wh-名词性从句。由于后面有...
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