YOU SAID:

I come here to visit my friend by train.

INTO JAPANESE

私は電車で友達を訪ねに来ました。

BACK INTO ENGLISH

I came to visit my friend by train.

INTO JAPANESE

電車で友達を訪ねるようになりました。

BACK INTO ENGLISH

I started to visit my friends by train.

INTO JAPANESE

私は電車で友達を訪ね始めました。

BACK INTO ENGLISH

I started visiting my friends by train.

INTO JAPANESE

私は電車で友達を訪ね始めました。

BACK INTO ENGLISH

I started visiting my friends by train.