The use of modals, asking/giving/ refusing permission, obligation/ necessity, advice,  polite request, prohibition, possibility/ probability/ present ability/ past ability.How to use shall, ought to, can , could, should, may, might, must, mustn't,  need, needn't, have to, don't have to, 

modal-verbs-grammar-drills-grammar-guides_101407.docx

Modal Verbs

modal-verbs

Let's do English ESL grammar guide. The use of modals, asking/giving/ refusing permission, obligation/ necessity, advice,  polite request, prohibition, possibil…