Matching Pairs Modal Verbs:Can - could - must - should - have toOnline version Match the modal with the use. by MARIA DEL PRAD SOBRINO DE TORO 1 Couldn't 2 Have to 3 Can 4 Don't have to 5 Can't 6 Should 7 Must 8 Mustn't 9 Shouldn't 10 Could Not possible in the present Obligation Obligation (not authority) Recommendation Not possible in the past Present possibility Prohibition Not recommended Past possibility Not obligated