be about to …

结构︰

主语＋be about＋to-不定词…

说明︰

此句型意为“将做…”。表示极近的未来之行为，故为了表示几乎等于现在的未来而不和未来之 <副词>一起使用，如：不能说“I am about to go next week.”。

He was surely about to change his mind.
他一定会改变主意。
She was about to walk out of the door when the telephone rang.
电话铃响时她正要出门。
Something unusual was about to happen.
某种不寻常的事正要发生。