be about to do 句式中 about这个词在句中做什么成分?

be about to do 句式中 about这个词在句中做什么成分? 请问They really mean a lot to me是什么句式?如：”is about to的句式是”be about to do something．并用此句式造句, 英语翻译用be about to do sth when 的句式 Do you want to know anything about( )a.how a good student to be b.how to be a good student在详细讲讲宾语从句中陈述句式的写法我写作文用Do you want to know anything about后面加句子怎么加，举几个例子 用下列句式造句（英语）1.be going to do sth2.be doing3.be+to do sth4.be about to do sth5.will be doing6.If引导的条件状语从句里面用一般时表将来时 意大利语中be+形容词for sb to do sth的句式是怎样的? be to do be about to do 有什么区别 be to do & be about to do的区别 be about to do和be about doing 区别 be to do,be going to do,will do,be about to do的区别. be about to do 短语中about做什么成分?be about to do里面about做什么词性?about不是只可以做介词和副词么?但在短语中about做表语,介词可以作表语么? be about to do sth的用法 be about to do用法,例句 be about to do怎么用 用be about to do做句子 be anxious about /to do sth. 一般将来时五种基本句式的区别就是shall will be going to be to do be about to do请帮我讲解他们之间的联系与差别好吗谢谢 will e doing to do e about to do e to do的区别