Prepositions are small words that connect elements  in a sentence. They are essential because they provide additional  details about the sentence.

We use prepositions of movement to express movement or directions.

https://open.books4languages.com/english-a2-grammar/chapter/prepositions-of-movement/

Prepositions are small words that connect elements  in a sentence. They are essential because they provide additional  details about the sentence.

We use prepositions of time to locate an event in a time frame {see Common Prepositions of Time and Place, A1 level}.

https://open.books4languages.com/english-a2-grammar/chapter/prepositions-of-time/

Nouns refer to a person, place, thing, event, substance or quality.

Invariant nouns are nouns which have the same singular and plural form.

https://open.books4languages.com/english-a2-grammar/chapter/invariant-plural-nouns/

A few/a little and few/little are quantifiers which mean not enough or some/enough.

https://open.books4languages.com/english-a2-grammar/chapter/a-few-vs-a-little-and-few-vs-little/

Nouns refer to a person, place, thing, event, substance or quality.

Uncountable nouns are nouns which cannot be counted easily or what we refer to as a mass {see Countable and Uncountable Nouns, A1 level}.

https://open.books4languages.com/english-a2-grammar/chapter/uncountable-nouns/

We can use the to-infinitive structure to express someone’s purpose (the reason or the aim of an action).

https://open.books4languages.com/english-a2-grammar/chapter/the-infinitive-of-purpose/

There are some verbs that need to be followed by a gerund or infinitive.

https://open.books4languages.com/english-a2-grammar/chapter/verbs-followed-by-gerunds-and-infinitives/

Adjectives are determiners that can be placed in two different positions within a sentence to modify or describe a person or a thing.

Adjectives can be used with active or passive voice.

https://open.books4languages.com/english-a2-grammar/chapter/active-and-passive-adjectives/

To be used to is a structure used to express habits and customs that are familiar to us.

The interrogative form is used to ask questions about the subject’s customs.

https://open.books4languages.com/english-a2-grammar/chapter/to-be-used-to-interrogative/

To be used to is a structure used to express habits and customs that are familiar to us.

When expressed in its negative form, the verb denies that the subject has some customs.

https://open.books4languages.com/english-a2-grammar/chapter/to-be-used-to-negative/