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　　表示"可能性"的几种句式

　　(1)It is possible (for sb.) to do=It is possible+that从句。例如：

　　It is not possible for a man to be three metres tall.

　　=It is not possible that a man is three metres tall.

　　一个人不可能有3米高。

　　(2)It is likely+that从句或sb./sth. is likely to do sth.例如：

　　It is likely that he will be late.

　　=He is likely to be late.

　　他可能会迟到。

　　(3)It is probable+that从句。例如：

　　It is/seems probable that he will arrive before dusk.

　　他很可能黄昏前到达。

　　注意：(1)possible,likely与probable，可能性大小图示如下：

　　(2)probable的副词形式是probably，不可紧接于not等否定词之后。

　　×He won't probably come.

　　√Probably he won't come.

　　√He probably won't come.

　　√He won't come probably.