1 Summary

Grammatical units > 2
The grammatical units of English are these: word, phrase, clause and sentence.

Word classes > 3
The main word classes are these: verb, noun, adjective, adverb, preposition,
determiner, pronoun and conjunction.

Phrases > 4
There are these kinds of phrase: verb phrase, noun phrase, adjective prase,
adverb phrase and prepositional phrase.

Sentence elements > 5
The sentence elements are these: subject, verb, object, complement and adverbial.

English compared with other languages >6
English words do not have a lot of ending for number and gender.
Word order is very important in English.
The verb phrase can have a complex structure.
There are many idioms with prepositions.