間違いを教えてください

(1) It is a relief to hear you say that. I thought you were still upset.

(2) That TV looks as if it could have bought twenty years ago.

(3) That guy should be thrown out of the restaurant for behaving like that.

(1)(2)(3)の英文でどの文のどこの部分が間違ってるか教えてください。
お願いします。