thereis加可数还是不可数

there is后面加不可数名词或可数名词的单数形式，例如：

1、There is some hope that things will improve.情况好转还是有希望的。

2、There is a general belief that things will soon get better.大家普遍认为情况很快就会好转。

3、There is some doubt about the best way to do it.这件事怎么做才是最佳办法有点吃不准。