怎样的单词要双写(进行时)

怎样的单词要双写(进行时),答：在现在进行时中,当动词是以重读闭音节结尾时,一般都要双写最后一个辅音字母后,再加ing.常见的如：
1,She is sitting under the tree.(sit)
2,When I get school,my teacher is beginning his lesson.(begin)
3,He is shopping at the store.
4.The car is just stopping in front of me.
5.The boy is swimming in the river now.
6.The old man is running on the road.

动词单词最后是辅音结尾，倒数第二个是元音，举个例子像eat，t为辅音，前面发元音，所以要写成eatting，自己再找找双写的例子，看看是不是这个规律，也有可能我记错咯，呵呵。、