Edit the following sentence to eliminate any grammar errors: They tried to fix the car all day.
They tried to fix the car all day. (The sentence is already grammatically correct.)
Complete the following task based on the instruction and optional input provided.### Instruction:
Edit the following sentence to eliminate any grammar errors: They tried to fix the car all day.

### Output:
They tried to fix the car all day. (The sentence is already grammatically correct.)