because of是个短语介词，不可以引导原因状语从句，而应该接名词，代词等。
复合介词because of所引导的介词短语通常用作状语而不用作表语。
例句
They abandoned the match because of rain.
因为下雨，他们中止了比赛。
She had left him because of his drinking.
她离开了他，因为他酗酒。
They knocked off $60 because of a scratch.
因为有擦痕他们将价格降了60元。
