when he grows up

[navi tasan]

Is this sentence correct:
1-When he grows up, he wants to be an engineer.

 

[Tdol]

It's fine. What was your doubt? ;-)

 

[navi tasan]

I wondered whether one could put the time clause in the beginning of the sentence in written English. I think it would be better to put it in the end.

 

[Tdol]

I see- at the end might be more common, buut at the beginning is equally fine. ;-)