Как переделать данные предложения в косвенную речь, поставив глагол в главном предложении в времени: 1. the teacher will give you further instructions. 2. the lecture will begin in five minutes. 3. could i speak to mr. smith, please?

The teacher said he would give you further instructions
As they said the lecture would begin during five minutes
I asked if I could speak to Mr. Smith