可以，be about to表示“正要；就要；即将；马上”等意思。以下是美国当代英语语料库（COCA）中的例句：

I didn't even know it was about to rain. I barely made it home through the traffic.

She could tell by the heavy clouds that it was about to rain.

Watch out, it's about to rain. Think about it. Not a small cloud, but a little cloud.

It was about to rain and she thought he was doing them a favor.

When Checco went outside, the sky was dark and it was about to rain.