I took your umbrella by mistake. ✬

It was wise of you to take your umbrella with you. ✬

Banks will try to lend you an umbrella on a sunny day, but they will turn their backs on a rainy day. ✬

I'm afraid I took your umbrella by mistake. ✬

It wasn't until I got home that I missed my umbrella. ✬

Take your umbrella with you in case it rains. ✬

Don't forget to take an umbrella in case it rains. ✬

Don't forget to bring your umbrella in case it rains. ✬

You'd better take your umbrella, just in case it rains. ✬

I think you'd better take an umbrella in case it rains. ✬