forget to dp sth和forget doing sth 以及remember to do sth remember doing sth造几个简单的句子

to do 和doing的区别是前者是还没做,后者已经做了,所以区别在时态.
I forget to buy the book.
T forgot buying the book.
remember也是一样的,只要把动词时态变掉,句型可以一样