求if follows that的例句

应该是it follows that：由此得出结论..., 因而断定...

Thus it follows that there must be many kinds of mammals,...
因此结论就是，有很多哺乳动物。。。

it follows that he knows nothing about that.
结果证明他对此一无所知。

你想要的是if follows that还是it follows that?
一般好像说it follows that.

if follows that 语法说不通!!

it follows that。。。接下来发生的是。。。