Summary number 1

Page 1

Must

Used for things that are necessary to do.

Debes.

Estructure: subject + must + verb

Verb: in base form

Example: We must stay with them.

Page 2

Mustn’t

Used for something is prohibited or against the rules.

No debes.

Estructure: Subject + Mustn’t + Verb

Used in laws because is the maxim prohibition.

Example: You mustn’t play here.

Page 3

Have to

Used for obligations or rules, is something you must do.

Tienes que.

Estructure: Subject + have/has to + verb

Verb: in base form

Have: You, I, We, They

Has: She, He, It

Example: She has to study tomorrow.

Page 4

Can’t

Is a informal prohibition.

No se puede.

Estructure: Subject + Can’t + Verb

Verb: in base form

Example: He can’t eat now.

Page 5

Not allowed to...

Is a formal prohibition like the rules.

No esta permitido.

Estructure: Subject + is/are/am + Not allowed to + Verb

Example: I not allowed to throw the trash in the floor.