Сложить предложения! 1)we/wait for you/if/you/be/late 2)if/you/be/hungry/i/make you a sandwich 3)if/jack/not/practise/they/not/play well 5)i/help you with your maths/if/you/not/understand it

1) We will wait for you if you are late.
2) If you are hungry, I will make you a sandwich.
3) If Jack isn't practise, they will not play well.
5) I will help you with your Maths if you aren't understand it.