Be, keep, etc. in trim American British informal
If you say that you are in trim, you mean that you are in good physical form and stay healthy.
I keep in trim by running and doing aerobics every morning.
Residents often walk as it is one of the easiest ways to be in trim.
Jame used to played badminton but that hasn't been enough to keep in trim.
The verb "keep/be" should be conjugated according to its tense.
To do something in the wrong order
Don't put the cart before the horse by saying something without consideration.