1

I heard someone said "yesterday was raining, so I didn't go outside of house", which seems to be a misuse.

per this post

To describe what is actually happening right now, you use the verb form:

It is raining.

To describe the sort of day it is, you use the adjective form:

Today is a rainy day.

it is the sort of day (rainy) that causes the speaker I didn't go outside of house, so the rainy is more appropriate, right?

0

Both sentences are correct. "Raining" is a very tricky one because it is actually a gerund. It is functioning as a noun in this sentence.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy