明天我会长大怎么说英语

"I will grow up tomorrow" or "I will be grown up tomorrow" are both ways to say "I will be an adult tomorrow" in Engpsh. It's important to note that this phrase is not typically used in Engpsh to describe physical growth or aging, but rather to describe reaching a certain level of maturity or independence.

If you are looking for a way to describe physical growth or aging, you might say "I will be older tomorrow" or "I will have grown another year" to indicate that you will have aged another year. Alternatively, you could say "I will have grown taller/shorter" or "I will have changed physically" to describe physical changes that might have occurred.