English Grammar A1 Level: Adjectives are determiners that can be placed in two different positions within a sentence to modify or describe a person or a thing.

Possessive adjectives are used to show that something belongs to someone.

https://open.books4languages.com/english-a1-grammar/chapter/possessive-adjectives

English Grammar A1 Level: Comparatives are used to compare two things, people or actions while superlatives express the superiority of one thing, person or action.

There are some adjectives and adverbs with irregular comparatives and superlatives.

https://open.books4languages.com/english-a1-grammar/chapter/irregular-comparatives-and-superlatives

English Grammar A1 Level: Adverbs are words that function as modifiers of  sentences, clauses or various elements of clauses. They can provide a  wide range of information.

Adverbs of degree are used to provide information about the intensity of an action or adjective.

https://open.books4languages.com/english-a1-grammar/chapter/adverbs-of-degree

English Grammar A1 Level: Adverbs are words that function as modifiers of  sentences, clauses or various elements of clauses. They can provide a  wide range of information.

Adverbs of frequency are used to give information about the frequency of an event.

https://open.books4languages.com/english-a1-grammar/chapter/adverbs-of-frequency

English Grammar A1 Level: Ordinal numbers express numerical sequences, positioning elements in a list.

https://open.books4languages.com/english-a1-grammar/chapter/ordinal-numbers

English Grammar A1 Level: Prepositional phrases are the result of the combination of a preposition and other elements of the sentence (nouns, pronouns, gerunds…).

https://open.books4languages.com/english-a1-grammar/chapter/prepositional-phrases

English Grammar A1 Level: Prepositions are small words that connect elements in a  sentence. They are essential because they provide additional  details about the sentence by locating events, people and objects in a time and place.

https://open.books4languages.com/english-a1-grammar/chapter/common-prepositions-of-time-and-place

English Grammar A1 Level: Be going to is a structure that refers to the future.

https://open.books4languages.com/english-a1-grammar/chapter/be-going-to

English Grammar A1 Level: How many is used to ask questions about the quantity of a countable noun.

How much is used to ask questions about the quantity of an uncountable noun.

https://open.books4languages.com/english-a1-grammar/chapter/how-many-and-how-much

English Grammar A1 Level: A modal verb is a type of auxiliary (helping) verb  that has no meaning on its own but it modifies the main verb, changes  its meaning and gives more details about the action.

The verb do is an auxiliary verb used in negative or interrogative sentence.

https://open.books4languages.com/english-a1-grammar/chapter/do-auxiliary-verb