adjectives+preposition+gerund i'm good at swimming. adjective+gerund i'm busy cooking verb+gerund i like drinking tea. i look forward to +gerund: i'm looking forward to hearing from u. gerunds can be used as subjects: swimming is my favourite hobby.

A gerund is similar to a noun but it is not a noun. For example, He is drinking coffee. "is" is your verb. "drinking" is your gerund. Even if the sentence is past tense -> He was drinking coffee. The gerund never changes. It is always -ing. He's a website with some more examples: http://www.chompchomp.com/terms/gerund.htm

While you stroll along the street, whenever you take this great luxury, try to classify what you see, like persons' interactions in gerund-yes/gerund-not bins. Of course you will need a good assortment of verbs to accomplish the task. Please also remember being watchful over cars while crossing the streets and thinking over gerunds, so that we will be enjoying more of your questioning here.