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问题 host前为何不加冠词

我们老师讲的 be / play host to sb / sth, 招待某人 / 成为.....的东道主。我有个疑问，host 是名词且可数（词典上没标是不是可数，但是有复数形式），为什么这里不加 the 呢？

问题 英语难句分析

Straitford's briefs don't sound likethe usual Washington back-and-forthing, whereby agencies avoid dramaticdeclarations on the chance they might be wrong.whereby什么意思？句子中的 agencies 指代 Straitford 还是 usual Washington？求解释!

问题 请教一个倍数翻译的问题

To be successful, the program would need to receive about seven times as much money as it currently receives.这句话是什么意思？是说项目需要收到7倍于当下的利润，还是说项目需要7倍于当下的投入？

问题 whether...not 的用法

He wondered whether his experience might not be a dream.1. 这句是不是表示肯定的意思，他想弄明白他的经历是个梦。而不是疑问的意思：想弄明白是否是个梦？2. 它和 whether...or not 是有区别的？

问题 分析介词短语在句中的成分

you must be chilly without a coat on.这个介词短语是条件状语吗？on作为副词跟在名词后面是什么结构?

问题 end up doing

But for all its scale, it might end up being put on for 13-year-olds as a sleepover entertainment.这里的end up doing，doing是伴随状语，up是副词，end是不及物动词吗？

问题 well修饰在被动时态中过去分词

well可以表示（副词）很好和非常两个意思，在使用非常这个意思时，在被动语态中可以修饰过去分词吗？如be well sought after

问题 关于不定式做定语的用法

You should decide what kind of knowledge to master You should decide what kind of knowledge to be mastered 这两句话有什么不同？

问题 比较级more than的还原问题

think someone can do more than may be possible。不懂这句话怎么还原

问题 为什么不加ing

There is no point me doing this if I can't be myself为什么point不加ing？

问题 it的指代

Joe Biden has described himself as a "bridge" between the Democrats' current and future generations of leaders. But he may also be a bridge between its present and future on the electoral map.请问it指代的是什么

问题 it的指代

Joe Biden has described himself as a "bridge" between the Democrats' current and future generations of leaders. But he may also be a bridge between its present and future on the electoral map.请问it指代的是什么

问题 was distressed about

One participant detailed （dreaming about a vegetarian crocodile who was distressed about not being able to eat children）。请问括号里面的句子是宾语从句吗？dream为什么 要用ing形式？was distressed about做句子的什么成分？

问题 伴随状语还是并列句

He smiled, stared at her hands for a moment, then walked away.把stared换成staring可以吗，作伴随状语？ 怎么区分并列句还是伴随状语啊，还有一个问题，好多人都说伴随状语不能用being done 这句话对吗?

问题 这个while究竟应该怎么正确理解用法含义

请教曹老师：She entered the station twenty minutes before the train was due, since her parents had impressed upon her that it would be unforgivable to miss it and cause the friends with whom she was going to stay to make two journeys to meet her. She gave her luggage to a porter and showed him...