用适当的连词填空，关于had(just)done..when..刚做完…这时…的用法。

Question

I had gone only a few steps _____ I realized that my greeting had been impolite.
It was only ____ I has turned the corner of the street that I realized, too late,that his name was Tony and the time was late afternoon.

=Only _____ I has turned the corner of the street,I realized,too late,that his name was Tony and the time was late afternoon.
为什么第一个填before，第二个填when，第一个不可以填before吗?

Answer 1

这是两个不同的句型

1、如果要表示“刚一…就”，要用had (just / hardly / scarcely )done … when (或before) … 句型。第一个句子表达的就是这种意思，空白处既可以用 when 也可以用 before，其结构如下：

主句：Ihad gone only a few steps。

时间状语从句：before / when I realized that my greeting had beenimpolite。

2、如果强调某一个成分，要用 it is … that …强调句型。第二句就是强调时间状语从句，其结构如下：

强调句型：it was … that。

时间状语从句：only when I had turned the corner of the street 【插入强调句型中间】。

主句：Irealized, too late, his name was Tony and the time was late afternoon 【放在强调句型的连词 that 后面】。

辅音

（注：多数辅音的读音与拼音差别不大，可以通过拼音来进行谐音；还有一部分辅音没有对应的拼音字体，这里我们主要是针对/θ ð ʃ ʒ/这四个辅音）其中，/θ/和/ð/这两个音标，它们并没有相近似的拼音来对应，主要是靠嘴形来记忆。

/θ/――上下牙齿咬着舌头尖，发“斯"的音；/ð/――舌头顶上牙堂发拼音z一声；/ʃ/――师；/ʒ/――牙齿闭合，舌头虚碰牙齿发拼音r一声。

Answer 2

这是两个不同的句型

1、如果要表示“刚一…就”，要用had (just / hardly / scarcely )done … when (或before) … 句型。第一个句子表达的就是这种意思，空白处既可以用 when 也可以用 before，其结构如下：

　　主句：Ihad gone only a few steps
　　时间状语从句：before / when I realized that my greeting had beenimpolite.
　　
2、如果强调某一个成分，要用 it is … that …强调句型。第二句就是强调时间状语从句，其结构如下：

　　强调句型：it was … that
　　时间状语从句：only when I had turned the corner of the street 【插入强调句型中间】
　　主句：Irealized, too late, his name was Tony and the time was late afternoon 【放在强调句型的连词 that 后面】

显而易见，两个句子主句和从句之间的行为正好是相反的时间关系。

　　第一句 realized是从句中的行为，主句中I had gone 发生在realized 以前，也就是说 “意识到的时候刚刚走了几步“。
　　第二句 realized 是主句的行为，从句中 I had turned 发生 realized 以前，也就是说“刚拐过弯的时候才意识到”。本回答被提问者和网友采纳