Paraphrase. using the for-infinitive construction: 1. this is a problem you should solve all by yourself 2. he spoke loudly so that everyone might hear him 3.it is quite natural that he should act like that 4.that a man of his age should be so active and full of life is something extraordinary 5.the ice has become too thin; it's dangerous to go skating 6. he is just the man who you should have consulted 7. let us wait till the solve this problem и можете объяснить как вы сделали это заранее большое