题目内容：

They are all 17.还是They all are 17.

优质解答

1.all作为代词“全部、全体”并做主语时,在句首,如：All of us arestudents.2all作为代词“全部、全体”并做同位语时,在被同位的名词或代词之后,如：They all went to the parkyesterday.We are all students.3.all...