"They have many difficulties to complete the project in two years." 这句话对吗?

问题描述:

"They have many difficulties to complete the project in two years." 这句话对吗?
如果哪位能够帮忙分析一下错在哪里或者分析一下句子结构就更好了,

不对.to complete要改为:completing
要掌握这个句型:
have difficulty / difficulties (in) doing sth.做某事有困难
或;have have trouble / problems (in) doing sth.