I learned different parts of speech used to form sentences. It is amazing how important each part is. Therefore, it is necessary to know each part and use them correctly in order to write sentences without problems.
Examples:
The cat is on the bed.
Students learn English in class.
The meeting is at 11 a.m.
Sentence 1: The cat is on the bed
The → Article / Determiner
cat → Noun
is → Verb
on → Preposition
bed → Noun
Sentence 2: Students learn English in class
Students → Noun
learn → Verb
English → Noun
in → Preposition
class → Noun
Sentence 3: The meeting is at 11 a.m.
The → Article
meeting → Noun
is → Verb
at → Preposition
11 a.m. → Adverb of time