IfMr.Dewey­

問題詳情：

If Mr. Dewey­ _____ present, he would have offered any possible assistance to the people there.

A．were                      B．had been                 C．should be               D．was

【回答】

B

【解析】

試題分析：考查虛擬語氣用法。本題考查的是if條件從句與過去事實相反的虛擬語氣，故從句用had + v-ed，主句用would / could/ should / might + v-ed。句意：如果Dewey先生在場的話，他會提供那裏人們的任何可能的幫助。故B正確。

考點：考查動虛擬語氣用法

【知識拓展】

1. 表示與現在事實相反或不可能發生：條件狀語從句：一般過去時（虛擬語氣中be→were）主句用：would(should, could, might)+動詞原形。

If we had time now, we would read it again.

If I were you, I would work hard.

2. 表示與過去事實相反或不可能發生：條件狀語從句：had+過去分詞；主句：would(should, could, might)+have+過去分詞。

If I had known your telephone number then, I would have called you.

3. 表示與將來的事實可能相反或不可能發生：條件狀語從句：①一般過去時②should +動詞原形③were to+動詞原形；主句：would(should, could, might)+動詞原形。

If it should rain, the crops would be saved.

知識點：虛擬語氣與情態動詞

題型：選擇題