Надо. буду underline the correct words 1she's a terrible dancer you shouldn't / won't dance with her. 2) l forgot her birthday last year, so i must / can't forget it again this year. 3) i'm sorry i forgot, but i promise i'll / should get you a present tomorrow. 4) thank you for the present can /will l open it now? well, we haven't been invited to the party, so think we couldn't shouldn't go. 5) well, we haven't been invited to the party, so i think we couldn't / shouldn't go