хээй :)

Have you ever went to childrengarden?(kindergarten-нем.)
No,i have never went to childrengarden.
Has Mary ever met you?
Have you wrote the letter to your parents yet?
Have the flowers grown already?
Bus hasnt started off yet.(has not gone можно тоже употребить,но,по-моему,отправляться-это старт офф)
Have you thought about it already?
Who has drunk my coffee?
I have never danced with sabres.
I have never forgot the rules.

You have done your work,havent you?
Mother has cooked the dinner,truth? (тут чесна не знаю,как "правду" перевести,может "hasnt she?"))
Mary has read the book,hasnt she?
Lisa has talked to Peter,hasnt she?
I have read this novel during my holidays again.
I have read this novel earlier.
What have you learned since you have arrived here?How many friends did you get?
Have you ever been in Australia?
Mr.William has arrived here in 1970.

как-то так :) удачи!)))