Relier Pairs have to, must & should, plusVersion en ligne Checking vocabulary learnt/verb use MBO outdoor year1. Match the sentences or the missing word by the dots ....... par Tina Oomes-Swift 1 Do not do this. It is prohibited (not allowed). 2 Optimistic means... 3 It is a bad idea to do this. 4 A branch might fall out of that tree, You .......................... park your car here. 5 Pessimistic means... 6 It is not allowed. You ..............................park your car here. 7 You need to do this. It is compulsory. 8 Frustrated means... 9 It isn't necessary, but it is a good idea. You must do it. You shouldn't do this. (You should not do this.) ...positive state of mind and thinking that things will go well. shouldn't ...feeling annoyed that you can't do something or that something is not as you think it should be. You should do it. You must not do it. mustn't ...negative state of mind and thinking that things will go badly.