how exciting when Tom saw his bike back!为什么不用excited?
问题描述：
how exciting when Tom saw his bike back!
为什么不用excited?
答
+ed表示感到
+ing表示令人
答
Exiciting形容的“当汤姆看到自行车回来”的整件事情，可以换位“Tom is very excited when he saw his bike back.”
答
这 exciting 是形容 Tom saw his bike back 这事件,不是形容 Tom 个人的心情,所以用 exciting(it is exciting).
答
how exciting it is when Tom saw his bike back.
How excited Tom is when he saw his bike back.