Question

I was ___ for the beach,forgetting my appointment with the dentist,when my mother reminded me.

I was ___ for the beach,forgetting my appointment with the dentist,when my mother reminded me.
A. to leave
B.about to leace.
这里到底要不要about?

Answer 1

be to do 这种结构表示职责，义务，意图，约定，可能性等。
You are to be back by 10 o'clock 你必须十点钟回来
We are to meet at the school gate.我们约定在校门口见面。
be about to 表示即将做某事
the meeting is about to start 会议即将开始
这里应该选B
当妈妈提醒我的时候，我完全忘记了和音乐家的约会，正准备去海滩。
希望对你有帮助！

Answer 2

be to do 表示计划好，将来要做
be about to do 表示马上要去做，后面如果有when 表示当就要做某事的时候发生了某个突发事情
所以我认为要加about
希望对楼主有帮助~

Answer 3

用啊，be about to do ......when ......是固定结构，后面不是有when吗？