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