Question

to fly a kite is very easy同义句？

Answer 1

It is not difficult to fly a kite.

或者

Flying a kite is very easy.

同义句建议从句式和形容词入手。

Answer 2

To fly a kite is very easy。
放风筝很简单。
改为同义句:
It's very easy to fly a kite。
当句子的主语过长时，通常可以采用it作为整个句子的形式主语，并提到句首，变成:
It is adj to do sth.
这是常考句式，要记住的。