6. You must study hard to get good marks.

Must you study hard to get good marks?

What must you study hard to get good marks?

Which must you study hard to get good marks?

Where must you study hard to get good marks?

From where must you study hard to get good marks?

Why must you study hard to get good marks?

When must you study hard to get good marks?

How many must you study hard to get good marks?

How many times must you study hard to get good marks?

At what time must you study hard to get good marks?

How much must you study hard to get good marks?                         👉