Muitos alunos me perguntam como saber quando usar e ING ou TO na hora de escolher o tempo verbal mais apropriado . No entanto a regra é mais de memorizar do que de entender. 

Abaixo segue uma pequena lista com alguns verbos que pedem o gerúndio e outros que pedem o infinitivo.

Seguem alguns exemplos:
When two verbs are used together, the second verb is often in the gerund form (-ing) or the infinitive. There are no specific rules concerning which verbs take which form. Like irregular verbs, you will need to learn which form a verb takes.
Common Verbs + ‘ing’
go

enjoy

quit

discuss

mind

can’t stand

suggest
Examples:
They go jogging on Saturdays.

I don’t mind helping you.

They can’t stand driving in traffic jams.
Common Verbs + Infinitive
promise

plan

refuse

want

need

decide

hope
Examples:
I promised to help him.

Alice needs to start that task.

He decided to quit his job.