15624 个回答
介词短语作什么成分（Would you like it in a bag?)
Would you like it in a bag? 这句话可能是售货员问顾客是否需要把商品装在一个袋子里。相当于我们在超市收银台付款时，被问到：要袋子吗？Would you like it (to be) in a bag?(to be) in a bag为宾补。
回答于 1秒前
on which + 不定式 理解
介词+which+to do不定式，语法上称为带有关系代词which的不定式。这种结构为正式用法，在句子中作定语。本质上，这种结构是某种特定的定语从句的简略形式。我以网友问题中的句子为例作以说明。You need a solid foundation on which to build your house. 这个句子对应的定语从句为：You need a solid foundation...
回答于 1秒前
may not 与 be possibly not 的区别
二个句子意义相同，但结构不同。一个用副词表示情态意义——可能性，一个用情态动词表示推测——可能。还可以用形容词likely, possiple表示这种意义：It is likely/possible that drugs are not as safe as previously thought.
回答于 1秒前
be supposed to be doing是动名词还是情态动词表进行
be supposed to do 大约等于 should do. 你换成should试试。I should be watching her like a hawk. 如果watching是动名词，则be是系词。动名词作表语，主语不可能是人。所以很容易排除动名词作表语。你觉得难以区分，是因为你忽略了动名词作表语时和主语的逻辑关系，即A=B。例如，My job is cleaning the offices. 主语如...
回答于 1秒前
动词不定式区别
选项中的结构就是所谓的提升主语结构。一个由it作形式主语，真正that主语从句外置的句子，在一定情况下可以转换成用that从句的主句作主句的主语，而that从句的谓语改为不定式结构的句子。例如下句：It is said that he wrote/is writing/has written a new book. 这句被动语态谓语“说”的内容是that从句表示的内容，而...
回答于 1秒前
关于状语从句的省略
To the couple's great surprise, the house was in a mess as if it had been broken into.break into的动作是was in a mess这个状态之前发生的动作，只能用过去完成时。此时，陈述语气形式和虚拟语气形式重叠。你无需为看不出是否虚拟语气而烦恼。从句表示的是否是事实其实是由语境决定的，而不是由动词形式决定...
回答于 1秒前
存在serve to do sth这样的to do sth作为宾语的结构吗
《韦氏高级》将serve后接to do不定式用法归为不及物用法，不定式作结果状语。: to have a particular result or effect — often + asBabysitting his nieces served as a test of his patience.— often followed by to + verbShe tried hard but her efforts only ...
回答于 1秒前