Inattentive

The driver was inattentive and could not stop in time.

She accused him of being inattentive to her.

I'm surprised how inattentive I can be.

I once had a teacher who used to throw chalk at inattentive students and those very students then had to bring it back to him.

Alas, I was inattentive.

You might have prevented the accident if you hadn't been so inattentive.

Tom was inattentive in class.

Tom is often inattentive in class.

Ziri is clumsy and inattentive.

You're inattentive.