Слово начинается на согласную букву,an ставится,когда слово начинается с гласной
An apple,например
1) I am going to
2)I will do
3)I won't
4)Is the play starting?
5)I am going to become
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4.2 have toured,,,,never came
3.has worked....opened
4.has star..... have made
5.have won ....beaten
P.simple -1) I usually spend my freetime with friends;
2)She wakes up at 7o clock every day
P.continuous - 3)He is reading a book now
4)We are dancing at the moment
P.perfect - 5)he had never been to london
6)i have already eaten this apple
P.Perfect continious - 7)i have been eating this apple since early morning
8)we have been learning this poem since afternoon