be about to do sth… when和while的差别……be about to do sth… when和be about to do sth…while差别是什么?请给出明确的解析!

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/28 00:52:22
beabouttodosth…when和while的差别……beabouttodosth…when和beabouttodosth…while差别是什么?请给出明确的解析!beabouttodosth…

be about to do sth… when和while的差别……be about to do sth… when和be about to do sth…while差别是什么?请给出明确的解析!
be about to do sth… when和while的差别……
be about to do sth… when和be about to do sth…while差别是什么?请给出明确的解析!

be about to do sth… when和while的差别……be about to do sth… when和be about to do sth…while差别是什么?请给出明确的解析!
be about to do sth...when...固定句型“正准备...这时...” 不能用while

意思上没什么区别,但是while后面必须加ing