Be due to is used to talk about things that are expected or planned to happen at a certain time. We often use it with a time expression:
Are you due to hand in homework today?
The train is due to arrive at Glasgow Central at 12:12.
Be likely to
Be likely to is used to talk about how probable things are:
Are parents who have a lot of money likely to spoil their children?
It is often used to make comparisons with words like more and less:
I think men are more likely to spend a lot of money on food than women are.
I liked Budapest as well.
Yeah. I’mprobablyless likely togo back there than to Prague.
We also use it’s likely followed by that + clause:
It’s likely that sales will rise.
We form the negative of be likely to and be likely that either with not or with unlikely. Unlikely is more formal:
The company is not likely to make a profit in the second half of the year.
People are unlikely to listen to him now because they know he lied.
Be meant to
Be meant to is used to talk about what is desirable, expected or intended:
It looks green to me.
Oh, isitmeant tobe a different colour?
It was meant to be like a quiz and we were all in different teams and there was meant to be a fantastic prize.
Be supposed to
Be supposed to is used to talk about obligations and arrangements:
Where were you? You were supposed to be at the party!
You’re supposed to have an hour for lunch. That’s the law.
It’s also used to talk about people’s expectations or beliefs about something:
[talking about some medicine]
Take some of this.
What’sitsupposed todo? (What does it do to you?)
And then I’m gonna get a train over to Brussels which takes all day as well. It’s supposed to be a nice route with forests and mountains and things. (gonna represents ‘going to’, as it is pronounced in informal speaking.)