Complete the sentences using unreal conditional (present or past) 1.i would be late for the lesson, 2.i would have come to you, 3.i would have given you my text-book, 4.i would have helped you

1.I would be late for the lesson, if I missed the bus.
2.I would have come to you, if you had invited me.
3.I would have given you my text-book,if you had asked me about it.
4.I would have helped you if I had not been so busy.