9.1. I don’t find this book very interesting. 

(!I lost an interesting book.) (This book doesn’t interest me much.) (!I can’t find a book which interests me.)

9.2. You are not allowed to swim without a cap.

(!Swimmers don’t have to wear a cap.) (!I do not go swimming without a cap.) (Swimming without a cap is forbidden.)

9.3. It took Vicky thirty minutes to buy a dress for the party.

(Vicky spent thirty minutes buying) (!In thirty minutes Vicky is going to buy) (!Vicky wanted to spend thirty minutes on buying)

9.4. The printer I bought here doesn’t work so I want a full refund.

(!I want to ask for a discount) (!I want to return the money) (I want to get my money back)

9.5. We will have a barbecue next Saturday on condition that the weather gets better.

(!unless the weather is better) (if the weather improves) (!even if the weather is bad)