"Will" or "Going to"
First Conditional
Modals
Comparisons
100

I (go) to karate practice after school today.

I am going to go to karate practice after school today.

100

If the weather (be) nice, we (play) football.

If the weather is nice, we will play football.

100

My parents said I _ clean my room if I want to go out this weekend. (Obligation/necessity)

My parents said I must/have to clean my room if I want to go out this weekend. (Obligation)

100

Madrid is (crowded) than Alcorcón.

Madrid is more crowded than Alcorcón.

200

In 100 years, humans (live) on the moon.

In 100 years, humans will live on the moon.

200

If she (stay) up late tonight, she (feel) tired tomorrow morning.

If she stays up late tonight, she will feel tired tomorrow morning.

200

My older brother _ sleep well because he drinks too much coffee. (Ability)

My older brother can't sleep well because he drinks too much coffee.

200

I'm (heavy) than my parents.

I'm less heavy than my parents.

300

My dog (be) so happy when I come home today.

My dog is going to be so happy when I come home today.

300
I (stay) at home if it (rain) tonight.

I will stay at home if it rains tonight.

300

The teacher says we _ sleep in class, even if we're tired. (Obligation/necessity)

The teacher says we mustn't sleep in class, even if we're tired.

300

Because of all the palm trees, the beach is (shady) than the city.

Because of all the palm trees, the beach is shadier than the city.

400

Do you think scientists (invent) a robot that takes care of people?

Do you think scientists will invent a robot that takes care of people?

400

If he (study - negative), he (pass - negative) the exam.

If he doesn't study, he won't pass the exam.

400

If you want good marks, you _ study more for this exam. (Advice)

If you want good marks, you should study more for this exam.

400

The sun is (bright) than the rest of the objects in the solar system.

The sun is brighter than the rest of the objects in the solar system.

500

(You/hike) in the mountains tomorrow?

Are you going to hike in the mountains tomorrow?

500
Adrián (let) us watch a movie if we all (pass) the exam. 

Adrián will let us watch a movie if we all pass the exam.

500

I _ run five kilometers before, but now I _. (Ability)

I couldn't run five kilometers before, but now I can. (Ability - past and present)

500

Spain was (peaceful) 100 years ago than it is today.

Spain was less peaceful 100 years ago than it is today.