1.   If the rain starts coming down, we can always go inside.

2.   Rain was starting to fall from the grey sky.

3.   The rain had started to fall and the mechanics were busy preparing the machine for what would be a wet race.

4.   The rains have started early this year.

5.   There was a roll of thunder, and the rain started pelting down.

6.   When the rain started, the crowd vanished in an instant.

7.   We were still out in the fields when the rain started coming down.

8.   The crowd ran for shelter when the rain started.

9.   But when he thought he had reached the peak of his misery and was regretting ever coming to this place the rain started to slow and ease off.

10.   An unexpected rain started.