Prohibition.

Examples:

• Everybody knows that you musn't smoke in the hospital.
• A mother tells to her child: "You musn't play with matches".

Obligation.

Examples:

• There's a poster on the wall of the library that says: "You must be quiet".


• I have to attend a meeting.The boss has asked me to attend it.

Singular and plural nouns.

Examples:

• Yesterday I ate one apple.Today I am going to eat two apples.
• Last saturday a hundreds of men had died in a fatal plane accident.

Uncountable nouns.

Examples:

• Can you give me some money?
• I want a glass of watter.
• Do you like to listen to music?

Countable nouns.

Examples:

• There are two tables and four chairs.


• I want an orange.


• I have a book in my bag.

Adjectives.

Examples:

• Yesterday I saw an exciting film in the cinema.
• We are really tired because we have been working hard.
• Are you frightened of rats?

Adverbs.

Examples:

• Sara drives slowly.
• They answered the question perfectly.
• He came back home suddenly.
• She will possibly arrive late.