YOU SAID:

I think the local lemon thief has been taking and stealing all the orange lemons because he thought they were lemons

INTO JAPANESE

地元のレモン泥棒は、オレンジレモンがレモンだと思っていたので、すべてのオレンジレモンを盗んでいたと思います。

BACK INTO ENGLISH

I think the local lemon thief had stolen all the orange lemons because he thought they were lemons.

INTO JAPANESE

地元のレモン泥棒は、オレンジレモンをレモンだと思っていたので、すべて盗んだと思います。

BACK INTO ENGLISH

The local lemon thief thought the orange lemon was a lemon, so I think he stole it all.

INTO JAPANESE

地元のレモン泥棒はオレンジレモンをレモンだと思っていたので、全部盗んだと思います。

BACK INTO ENGLISH

The local lemon thief thought the orange lemon was a lemon, so I think he stole it all.