Kenny has given you correct answers. I'll just clarify one thing. "Hardly" is not the adverb for "hard". I think you're saying that the child will have to blow hard. "For your birthday, you'll have to blow hard to blow out the candle." ("Blow out" is a phrasal verb meaning to extinguish the candle with your breath.) "Hardly" means "barely." "The fog was so thick that I could hardly see." It means that I could see, but only just a little.

> The doctor told his patient to turn around so that he can give his heart a check-up .Then he asked him to return to his original position/posture 2- Make your toy go down the slide >ok >Take your toy and let it go on top of the slide , so I can see it going down (the slide) > Verb + subject + *ing ( continous tense is wrong) eg Make it go , not going 3-For your birthday, you'll have to blow out the candles in one breath . 4-You don't want to color your book? >ok (assuming its a colouring book) 5-Let's call on my brother, it's been a while since I last saw him! 6-Once the stickers are pasted , you can't remove them from the page/ sheet ( that they are pasted on) 7-She's splattered coffee on my laptop screen. I have to clean it.>ok 8-Let me put on your diaper correctly.(assuming you are talking to the person wearing a daiper )

1- Correct! 2- 'Make your toy go down the slide' is better 3- 'For your birthday, you'll hardly have to blow out the candle' 4- Correct! 5- 'Let's call my brother, it's been a while since I seen him!' 6- Correct! 7- 'She/She's splattered coffee on my laptop screen. I have to clean it.' Either is fine :) 8- Correct! Hope that helped :)