(The - No article ) teachers at my school are very helpfull

This year (I'll go - I'm going to go ) swimming every day

Correct :
My father was a sailor at the army

(The - No article ) teachers at my school are very helpfull

This year (I'll go - I'm going to go ) swimming every day

Correct :
My father was a sailor at the army



1 - the

2 - i'm going to go

3 - army --------> navy