due to 是不是一定要和be动词连用

due to 是不是一定要和be动词连用

due to如果做谓语，一定要和be动词连用，因为due是形容词。
due to如果做非谓语动词，可以直接使用，不加be动词。

例句辨析：
有be动词的情况
1、In part this attitude was due to fear of trade union and employee reactions.
在某种程度上，这一态度是由于害怕工会和雇员的反应。
2、The country's economic problems are largely due to the weakness of the recovery.
该国的经济问题很大程度上是因为复苏乏力。
3、I was relieved to find out that my problems were due to a genuine disorder.
得知我的问题确实是由于病症引起的，我松了口气。

没有be动词的情况
1、Unfortunately, due to unforeseen circumstances, this year's show has been cancelled.
遗憾的是，由于一些意外情况，今年的演出被取消了。
2、Due to official parsimony only the one machine was built.
由于官方过于吝啬，仅制造了那一台机器。
3、Due to a security alert, this train will not be stopping at Oxford Circus.
由于安全戒备的原因，该次列车在“牛津街口广场”站将不停留。

不一定的，可单独表示【原因】
It was a real prize due to its rarity and good condition.
因为稀有并且品相完好，它价值连城。