给你两个例句你就明白了
be due to:Thier success is due to their efforts.他们的成功归功于他们的努力,be due to是归功于,用于句中
Due to the bad weather,the flight has been delayed.由于坏天气,航班延误了,Due to 是由于的意思,通常用于句首
be due to,be是系动词,due to do...是表语
The next flight is due to take off in five minutes
due to作状语:由于
Due to the bad weather, I had to put off the sports meeting.