Ⅱ.重点句型详解
1．So many thousands of terrified people died every_time there was an outbreak. 因此每次暴发(霍乱)时，就有大批惊恐的人死去。

这是由名词词组 every time 充当连词的时间状语从句，意为“每当……”，相当于 when。某些表达时间的名词词组可直接充当连词，即“名词连词化现象”。常见的有：

(1)不定代词＋time　如：any time, each time...

(2)序数词＋time　如：the first/last time...

(3)the＋瞬时名词　如：the minute/moment/instant

(4)the＋时间名词　如：the day/night/month/time...

①He brings her flowers every time he goes to see her.他每次去看她都给她带花。

②The first time he did the experiment, he succeeded.他第一次做实验就成功了。

③I‘ll give him your message the minute he arrives.等他一到，我就把你的口信给他。

④He bought a computer the day he got his salary.他发工资那天买了一台电脑。

[即境活用1]　The boys ran off______ they saw the owner of the orchard (果园)．

A．at times　　 B．the hour  C．the moment D．at once

答案：C

解析：句中 the moment 引导时间状语从句，相当于 as soon as。

2．Only_if you put the sun there did the movements of the other planets in the sky make sense. 只有当你把太阳放在中心位置上，天空中其他行星的运动才能说得清楚。

only 修饰副词、介词短语或状语从句，放在句首时，句子要部分倒装，即把助动词、情态动词或系动词 be放在主语之前。

①Only then did I realize the mistakes I had made.只有在那时我才意识到我所犯的错误。

②Only in this way can you make progress.只有以这种方式你才能取得进步。

③Only when the war was over in 1949 was he able to get back home.只有在1949年战争结束时他才能回家。

拓展：if only要是……该多好，但愿。if only从句可单独使用，这时要用虚拟语气：表示与过去相反的愿望用 had done；与现在相反的愿望用 did/were；表示与将来相反的愿望用 “would/could/might＋动词原形”。

①If only I had gone to Beijing.我要是去了北京就好了。

②If only he could come tomorrow.他要是明天能来就好了。

[即境活用2]　______both sides accept the agreement will a lasting peace be established in this region.

A．Only if B．Unless  C．If only D．As long as

答案：A

解析：主句中用了“will＋主语＋be”倒装结构，故选 Only if。