1、…是不可能的; 无法…

There is no Ving= There is no way of Ving。= There is no possibility of Ving。= It is impossible to V。= It is out of the question to V。= No one can V。= We cannot V。

2、我深信…

I am greatly convinced (that)子句= I am greatly assured (that)子句

3、…是很容易证明的。

It can be easily proved (that)子句