Only recently _____to realize the dangers caffeine might bri

ynaji2022-10-04 11:39:543条回答

Only recently _____to realize the dangers caffeine might bring to our health .
A.that scientists began B.have scientists begun
C.scientist have begun D.that did scientist begin
正确答案为B,可是D为什么不行?
首先only用于句首，句子要用倒装形式，而且是部分倒装。从句中的might用了过去式，由此可以推断出主句要用过去的过去即过去完成时。
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哪来的过去完成时

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susanliangy 共回答了24个问题 | 采纳率87.5%: 你认为caffeine might bring to our health 是发生在realize之后吗?
这是逻辑的错误,
咖啡因对我们身体有好处是比我们发现还要早,我们发现是在他对我们有好处之后才出现的..所以不需要..; 1年前

灏梦共回答了47个问题 | 采纳率: 首先only用于句首，句子要用倒装形式，而且是部分倒装。从句中的might用了过去式，由此可以推断出主句要用过去的过去即过去完成时。; 1年前

teargas 共回答了146个问题 | 采纳率: 这个是个持续的动作，所以要用完成; 1年前

Only后面的倒装only then,only recently,only in the last year,only Only后面的倒装 only then,only recently,only in the last year,only the other day,only in this way,only when we checked the date..各种情况后面的倒装,给例句.. 斜眼看名人1年前2: 梦魇008 共回答了14个问题 | 采纳率92.9%

only位于句首修饰壮语要倒装 ;如
only in this way can you learn english well
是only引起的倒装句,will 是助动词,如果这个句子正过来说就是 I will have a chance of
achieving my dream only then
在句首的only如果后面跟了副词、介词短语或从句等状语,则主句用倒装结构.如only后跟
的是主语,就不用倒装结构了.例如：
Only when the war was over in 1918 was he able to get back to work．
Only in this way can you learn English well．
Only after a bitter struggle was the aim achieved．
Only the teachers are allowed to use the room．（不倒装）
Only five men were hurt in the accident．（不倒装）
注意,only和所修饰的状语如果不在句首,则不倒装.
如：
The boy was helped out only when his father arrived in a hurry．
Only then did he realize the importance of English
只有在那时候他才意识到英语的重要性.
only then ,是过一小会儿的意思,一般用在句首,引导倒装句.
例句Only then did he realize the importance of English．
解析：在句首的only如果后面跟了副词、介词短语或从句等状语,则主句用倒装结构.如only后跟的是主语,就不用倒装结构了.
再比如
Only when the war was over in 1918 was he able to get back to work．(倒装句）
Only five men were hurt in the accident．（不倒装)
还有：当only强调人,物,代词,名词时不倒装．而且不能用在否定句子里.
只能讲we needn't go to school only on Sunday.

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Only recently _____to realize the dangers caffeine might bri

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