He had problems breathing.（同义句转换）He had （trouble in） breathing.他呼吸困难.have trouble in doing,做某事有困难.What should you do?（同义句转换）What （do you need to） do?你需要做什么?need to d...His water ran out.同义句转换：He __ ___ __his water填 ran out of （他把水用完了。过去式）