Come to think of it

We use this expression to introduce something we had not thought of before.

You can use this phrase in ………… language.

 Spoken
 Written

Example 1
A: Have you seen Petra anywhere?
B: No. Come to think of it, I haven’t seen her all day. Is she here at all?
A: I don’t know.

Example 2
A: It’s a strange town. I haven’t seen any bars here.
B: Come to think of it, I haven’t seen any hotels or restaurants, either!