汉译英:我认为他错了

I think he is wrong 或者 I don't think he is right
就这么简单`````

你可以写I don't think he is right或者 I think he is wrong。但不能写I think he isn't right 希望对你有用，情人节快乐！

I think he is wrong.

I thought that he was wrong应该是过去时好不？