How to use the -ING form of verbs in English

source: Espresso English     2012年11月4日
Did you know that there are at least four different ways to use the -ing form of verbs in English?
#1 -- Use the -ING form of verbs in continuous tenses
#2 -- Use the -ING form when the verb is the subject of the sentence
#3 -- Use the -ING form after prepositions
#4 -- Use the -ING form after specific verbs in English