1、because是conj.後邊必須跟句子2、due to=owing to(prep)後邊必須跟名詞.3、because of後面接非句子,即短語或者非謂語.基本上due to =because of 應該就是這樣了

due to後可接短語、名詞

because後加句子，如果是because of 則和due to 差不多

due to 可以放在句首，而because of 通常不放於句首；

due to 主要引導表語，而 because of主要引導狀語。如：

His illness is due to bad food. 他

生病是由於吃了不好的食物。

The accident was due to careless driving.

這次車禍起因於駕駛疏忽。

He can’t come because of the bad weather.

他不能來是因為天氣不好。

Owing to the rain, the match was cancelled.

比賽因雨被取消了。

because of 通常只用來引導狀語，若引導表語，主語通常應為代詞。如：

It is all because of what you said. 那完全是因為你說的話。