Answer:
1. You ( not be ) ..are not of..... any use to me unless you learn to type
2. If I ( have ) ...will have.. enought money , I will buy a new skateboard
3.She will be angry if you ( not , tell ) ..do not tell.... the truth
4.If they take their medicine , they (feel) ..will feel... better
5 . We ( not , get) ...do not get. good marks if we don't learn hard
6.If he ( not , go) ...does not go. back now , he will be late
7.They ( not / let).... will not let. you in if you come late
8.If you ( not/go) ..do not go.. away , I'll send for a policeman
