YOU SAID:

The rain has begun to subside.

INTO JAPANESE

雨がおさまり始めました。

BACK INTO ENGLISH

The rain has started to subside.

INTO JAPANESE

雨が収まり始めた。

BACK INTO ENGLISH

The rain started to settle.

INTO JAPANESE

雨が降り始めた。

BACK INTO ENGLISH

It began to rain.

INTO JAPANESE

雨が降り始めた。

BACK INTO ENGLISH

It began to rain.