EwR.Vocabulary Poster #English Prepositions AT - IN - ON
All modal verbs are auxiliary verbs, which means they can only be used with a main verb. Modal verbs cannot be a main verb. They are used to express ideas such as possibility, prediction, speculation, deduction and necessity.
adverbs of frequency. Use them in the simple present tense.
24 most important prepositions with examples - learn English,preposition,grammar,english