Hello Woojung,

Thank you for submitting your home work, please take notes of my corrections.. See you in the class.

I think my funday and other people's funday is important to them everytime when they are sad or tired because it gives happiness, and exciting mind to people.

Correct: I think a day with so much fun is important for us to have every time we are sad or tired, because it can give us happiness and excitement.

**There is no such word as 'funday' but 'fun day' and 'day with/of fun' is alright. You can generalize the 'I and other people' with the pronoun 'us', and use it to be the object of the preposition. Use 'can' to state a possibility. It's better to use 'excitement' (noun), to make it parallel with the noun 'happiness'.

I am sure everyone should have least one funday to themselves.

Correct: I think everyone should have at least one fun day for themselves.

** 'I am sure' can be used when you have a basis for baing sure about a thing. Here, you can use 'I think' to express your opinion. Add 'at' before the word 'least' to mean 'slightest'. And as I have corrected earlier, there is no such word as 'funday' but you can use 'fun day'. Use 'for' as the preposition to mean 'in favor of'.

Then people will get an exciting mind to themselves everytime when their funday is coming or begining.

Correct: Then, people will feel excited during their fun day.