YOU SAID:
They've gone there many times before
INTO JAPANESE
彼らは以前に何度もそこに行ったことがある
BACK INTO ENGLISH
They have been there many times before.
INTO JAPANESE
彼らは以前に何度もそこに行ったことがあります。
BACK INTO ENGLISH
They have been there many times before.
You should move to Japan!