Big, Bigger, Biggest

Big. Bigger. Biggest.

大。更大。最大。

I can blow up a balloon.

我会吹气球。

My balloon is big.

我的气球很大。

Joe can blow up a balloon.

乔会吹气球。

Which balloon is bigger?

哪个气球更大呢？

Dad can blow up a balloon. Which is the biggest?

爸爸会吹气球。 哪个是最大的呢？