thereis加可數還是不可數

there is後面加不可數名詞或可數名詞的單數形式，例如：

1、There is some hope that things will improve.情況好轉還是有希望的。

2、There is a general belief that things will soon get better.大家普遍認為情況很快就會好轉。

3、There is some doubt about the best way to do it.這件事怎麼做才是最佳辦法有點吃不準。