状语从句疑问啊24.ItwasBitrainedheavilythattheydidn’tcome.A.asB.becauseC.forD.since此题ABC三个选项不都有因为的意思吗?为何选b?25.Whynotbuyacheaperone,A

Question

状语从句疑问啊
24. It was ____B______it rained heavily that they didn’t come.
A. as B. because C. for D. since
此题ABC三个选项不都有因为的意思吗?为何选b?
25. Why not buy a cheaper one, ____A_________you don’t have enough money?
A. since B. because C. for D. though
B不行吗?
28. Try __D____he might, he couldn’t get out of difficulty.
A. when B. where C. till D. as
此题完全没有思路
29. ______D____I saw the computer, I showed great interest in it.
A. At first B. For the first time C. Until D. The first time
这四个选项有什么大个区别吗? 我自己感觉每个都可以啊
30. I don’t think you’ll be able to understand this formula(公式) _____D_______you finish school.
A. as if B. only when C. even D. even when
C不可以吗?
请给位高手详解啊,我快被状语从句逼疯了,语法书上讲的好乱啊,看完后做题还是成半的错,5555~ ~ ~ 太痛苦了啊

Answer 1

24.这里缺表语,其他三个引导的句子都不能做表语 .
25.Why not是表建议的话,为什么不买一个更便宜的呢?很口语.这里用Since回答更加地道.Because都是表达的比较正式的问题后面正式的原因.
28.是倒装句,用as（尽管）引导的倒装句要把动词提前.意思为：尽管他很努力,他还是不能脱离出困难
29.The first time是固定的搭配,只能这样用,放句首后面接一个句子,意思为我一看见(什么什么)
At first是个副词短语,不能连句子,要打个逗号,For the first time 是放句末的一个补充的 Until意思都不对了 是直到（什么什么）的意思
30.even不能引导从句,要用when引导时间从句.句意为：我不认为你能够理解这个公式即使在当你完成了学业的时候.中国话省略了当什么的时候.