請分別解釋以下、從句、主句在虛擬語氣中的時態　If I had worked hard at school,I would be an engineer,too.　　如果我在學校學習刻苦的話,我現在也會成爲一個工程師了　　If they had info

請分別解釋以下、從句、主句在虛擬語氣中的時態
　If I had worked hard at school,I would be an engineer,too.
　　如果我在學校學習刻苦的話,我現在也會成爲一個工程師了
　　If they had informed us,we would not come here now.
　　如果他們通知過我們的話,我們現在就不會來這裡了.
If he were free today,we would have sent him to Beijing.
　　如果他今天有空的話,我們會已經派他去北京了.
　　If he knew her,he would have greeted her.
　　要是他認識她的話,他肯定會去問候她了.

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請分別解釋以下、從句、主句在虛擬語氣中的時態　If I had worked hard at school,I would be an engineer,too.　　如果我在學校學習刻苦的話,我現在也會成爲一個工程師了　　If they had info,第2張

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我先把上麪的兩個個句子改成常槼的用法：1, If I had worked hard at school, I would have been an engineer, too.2, If they had informed us, we would not have been here now.仔細躰會一下,我改過之後,其實意思...

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