I have to go to work tomorrow. You ought to get more sleep. You need to think again. You don’t need to worry.
     
     Note!!! The verb need has an alternative negative form, needn’t, which is followed by the infi nitive without to: 

You needn’t worry. 

afford, agree, arrange, appear, attempt, choose, decide, expect, hope, intend, learn, manage, offer, pretend, promise, refuse, seem: 
We can’t afford to go on holiday this year.

advise, allow, ask, convince, enable, encourage, forbid, force, get, instruct, invite, order, persuade, remind, require, teach, tell, train, want, warn, wish: You can’t force people to believe something. My father taught me to swim.
 
     Note!!! After the verb help, the to can be omitted before the infinitive:
She helped me (to) revise for my exam.

VERBS +  -ING

The -ing form of the verb is used after:

She can’t stand getting stuck in a traffic jam.

But note the following exceptions: 
– hate/like/love/prefer are usually followed by the -ing form but are sometimes followed by the to infinitive . 
– would + hate/like/love/prefer is always followed by the to infi nitive: I’d hate to get up early every morning. 

The prime minister has just finished speaking.

VERBS FOLLOWED BY TO INFINITIVE OR -ING
 A small number of verbs can be followed either by the infi nitive or by the -ing form.
With no difference in meaning
begin, can’t bear, cease, commence, continue, hate, intend, like, love, propose, start:
I’ve just started to learn / learning to ski.
He had intended to leave / leaving before midnight.

Note!!! With the verbs like, love, hate there can be this slight difference in meaning:
I like to clean my car every week. (The focus is on the result of the activity.)
I like cleaning my car every week. (The focus is on the activity itself, i.e. I enjoy cleaning it.)
With different meanings  

I saw the plane land. (= I saw the whole action.) 
I saw the plane landing. (= I saw part of the action.) 

I forgot to phone my brother. (= I didn’t phone him.
I’ll never forget phoning my sister that night. (= I phoned her and I recall it well.) 

Tom remembered to close the windows before he left. (= He did something he had to do; he didn’t forget.) 
Tom remembered closing the windows before he left. (= He recalled doing it.) 

She won her first race when she was seven and went on to break the world record. (= Breaking the world record was something she did later.) 
He went on walking even though he was exhausted. (= He didn’t stop walking.) 

I’m sorry, I didn’t mean to be rude. (= intend) 
If we want to catch the early train, it’ll mean getting up at 5:00. (= involve) 

I regret to inform you that you have not passed the test. (= I’m sorry about something unwelcome I’m about to say.) 
He now regrets taking the day off work. (= He wishes he hadn’t taken the day off work.) 

 We’d better stop to look at the map. (= stop what we are doing in order to do something else) 
There’s nothing you can do about it, so stop worrying. (= fi nish worrying) 

I’ve been trying to repair my computer all morning. (= attempt something diffi cult)
 Have you tried kicking it? (= do something which might solve a problem) 

I really enjoy pasta. What I really enjoy is pasta.

She wanted to find a job in New Zealand. What she wanted was to find a job in New Zealand.

Note!!! The verb in the what clause is often do. In this case, is/was is followed by an infinitive, with or without to:

They advertised on television. What they did was (to) advertise on television.

My house only needs a swimming pool now. All my house needs now is a swimming pool.

Mike paid the bill. It was Mike who paid the bill.

You should speak to the manager. It’s the manager (that) you should speak to.

They left Poland in 2012. It was in 2012 that they left Poland.

I like visiting other countries, but I don’t enjoy flying.

I like visiting other countries – it’s flying (that) I don’t enjoy