1 Match the rules (1-7) with the sentences (a-g). 1 We use the gerund as the subject of a sentence. 2 We use the gerund with go to talk about physical activities. 3 We use the gerund after verbs of liking or disliking. 4 We use the gerund after prepositions. 5 We use the infinitive to explain why somebody does something. 6 We use the infinitive after adjectives. 7 We use the infinitive after certain verbs. a My classmates love having a dog in the class. b I'm good at doing maths. c I want to go out by myself. d I couldn't go shopping on my own. e I went home to see if my mum was OK. f Going to school was difficult, too. gIt's hard to stop giving Betsy biscuits.