Comparisons
Superlatives
As...As...
Have to/Must
1st Conditional
100

July is (hot) October.

hotter than 

100

Shrek was (interesting) movie I've ever seen.

the most interesting

100

Anna is older than Marc.

Marc...

Marc is not as old as Anna.
100

Tomorrow is a holiday. We ..... go to school.

don't have to

100

barbecue will we have if it a rain doesn't

If it doesn't rain, we will have a barbecue. / We will have a barbecue if it doesn't rain.

200

I've worked (hard) this term.

harder

200

She is (healthy) person in my family.

the healthiest

200

Maths is more difficult than English.

English...

English isn't as difficult as maths.

200

It's a hospital. You ..... smoke in here.

musntn't

200

film you enjoy if will be I surprised

If you enjoy that film, I will be surprised. / I will be surprised if you enjoy that film.

300

John runs  (quickly)  Jane.

more quickly than 

300

That was (bad) meal I’ve ever had.

the worst 

300

Barça is better than Real Madrid.

Real Madrid...

Real Madrid isn't as good as Barça.

300

When you go on a safari, you ... follow the guide's rules because it can get dangerous.

must

300

come will you you party have time If to good a the

If you come to the party, you will have a good time. / You will have a good time if you come to the party.

400

I drive (carefully) than my mum.

more carefully

400

That's the (good) present I've ever received! Thank you!

the best

400

Listening is easier than speaking.

Speaking...

Speaking isn't as easy as listening.

400

At my friend's school you .....  wear a uniform but some people prefer to wear it.

don't have to

400

will If you wet don't an get take umbrella you 

If you don't take an umbrella, you will get wet. / You will get wet if you don't take an umbrella.