英语语法单选题

What worried the child most was _____ to visit his mother in the hospital.

A. his not allowing B. his not being allowed

C. his being not allowed D. having not been allowed.

答案是B。我想问其它选项错在哪里。

谢谢！

答：本题主要考的是非谓语动词的否定式。

记住，所有非谓语动词的否定式，都是将否定副词not放在最前面：

不定式：

not to do sth.

not to be done

not to have done sth.

not to have been done

动名词和现在分词：

not doing sth.

not being done sth.

not having done sth.

not having been done

过去分词：

not done

动名词的逻辑主语（逻辑上动作的主语）用名词所有格（Tom's)或形容词性的物主代词（his, my 等等）放在前面。

特别容易搞错的是not being done 和not having done 及not having been done.

其实本句中的his完全可以省略。