Some small issues Let others tell you what to do - no need for the additional to What clothes did you decide on for him? I decided on the mountain boots for Max Generally we use decide in the past tense unless asking about a timeframe for a decision eg will you decide what to do about this by next week or if asking if a decision is possible eg can you decide what to do. If you ask/talk about the outcome of a decision as in your examples then the decision has already happened and is therefore in the past tense. I hope this makes sense to you