Language/English/Grammar/INFINITIVES

When do we use the INFINITIVE? (ex : to do)

After verbs that refer to a future event : want, hope, intend, would like, promise ... Ex : I would like to do a course in medieval history. He promised to return the book after reading it. She hopes to find a job when she graduates.

After certain verbs such as : afford, agree, arrange, choose, need, fail, happen, help, learn, manage, offer, refuse, seem ... Ex : I agree to pay for the damage. Harry managed to get tickets for the match. We arranged to go to the party together.

After adjectives: glad/happy/relieved ...:  (glad to know that ...) pleased/delighted... :    (pleased to meet you...) disappointed/sorry... :   (disappointed to hear that ..)

After 'too' and 'enough' it's too difficult... Ex : It's too difficult to explain how it happened. it's easy enough... Ex : It's easy enough to install. You can do it yourself.