because of 用在句首或句子后面,表示原因.用法与because类似,不过其后只可接名词,动名词,名词性从句或短语 .例如：
It was all because of your necklace,your beautiful necklace.
那全是你的项链,你那条美丽的项链.
Because of the heavy rain,the sports meet has been put off.
因为大雨,运动会已推迟.
I came late because of the heavy rain.
由于交通阻塞我来晚了.
They are angry of what they have been told ..
他们因为被告知的事情而生气
He walked slowly because of his bad leg.
他走得慢是因为腿有毛病.
because：表示直接原因,可用于回答 why 提出的问题、引导表语从句、强调句等,例如：
“Why didn’t he come?” “Because he was ill.” “他为什么没来?”“因为他病了.”
My stomach hurts because I have eaten too many apples.我肚子痛,因为苹果吃得太多.
That’s because you can’t appreciate music.这是因为你不能欣赏音乐.
It is because he is honest that I like him.是因为他诚实我才喜欢他.