English Grammar A1 Level: Nouns refer to a person, place, thing, event, substance or quality.

A compound noun is a noun formed by a combination of words.

https://open.books4languages.com/english-a1-grammar/chapter/compound-nouns

English Grammar A1 Level: Nouns refer to a person, place, thing, event, substance or quality.

Plural form  is used to indicate that there is more than one person, animal, place  or thing. Some nouns don’t follow the rules, they’re irregular, so their plural is formed differently.

https://open.books4languages.com/english-a1-grammar/chapter/irregular-plural-nouns

English Grammar A1 Level: Nouns refer to a person, place, thing, event, substance or quality.

Plural form is used to indicate that there is more than one person, animal, place or thing.

https://open.books4languages.com/english-a1-grammar/chapter/plural-nouns-formation

English Grammar A1 Level: Nouns refer to a person, place, thing, event, substance or quality.

We can form a feminine version from a masculine noun when the person we’re talking about is a woman.

https://open.books4languages.com/english-a1-grammar/chapter/feminine-nouns-formation

English Grammar A1 Level: Nouns refer to a person, place, thing, event, substance or quality. 

We can find nouns which are the same for masculine and feminine genders.

https://open.books4languages.com/english-a1-grammar/chapter/noun-with-both-genders

English Grammar A1 Level: Nouns refer to a person, place, thing, event, substance or quality.

Nouns have three genders: masculine, feminine and neutral.

https://open.books4languages.com/english-a1-grammar/chapter/noun-gender

English Grammar A1 Level: The present simple is the tense used to express permanent situations or events that regularly repeat or always occur.

When expressed in its interrogative form, the verb is used to ask something about the subject.

https://open.books4languages.com/english-a1-grammar/chapter/present-simple-interrogative

English Grammar A1 Level: The present simple is the tense used to express permanent situations or events that regularly repeat or always occur.

When expressed in its negative form, the verb denies something about the subject.

https://open.books4languages.com/english-a1-grammar/chapter/present-simple-negative

English Grammar A1 Level: The present simple is the tense used to express permanent situations or events that regularly repeat or always occur.

When expressed in its affirmative form, the verb confirms something about the subject.

https://open.books4languages.com/english-a1-grammar/chapter/present-simple-affirmative

English Grammar A1 Level: To be is an auxiliary verb and it is essential in grammar.

When expressed in its interrogative form, the verb is used to ask something about the subject.

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