Good job — your sentence is mostly correct!
Original: The big combine cuts the wheat and takes the grain in one go.
Small improvements:
- Change takes to a clearer verb like collects or gathers. So the sentence becomes: The big combine cuts the wheat and collects the grain in one go.
- You can also say all at once instead of in one go, which is easier to understand: The big combine cuts the wheat and gathers the grain all at once.
Why? The words collects or gathers better explain what the combine does with the grain. Everything else (word order and verbs like cuts) is correct.
Nice work — your sentence is clear and only needs a small word change to sound a bit better!