| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] at least one [noun] | 26 |
|
| 2 | must [vb infin] at [adv] one [noun] | 26 |
|
| 3 | must [verb] at [adv] one [noun] | 26 |
|
| 4 | must [verb] at [adv] one [noun sg] | 26 |
|
| 5 | must have at [adv] one [noun] | 9 |
|
| 6 | must have at [adv] one [noun] | 9 |
|
| 7 | must include at [adv] one [noun] | 5 |
|
| 8 | must take at [adv] one [noun] | 5 |
|
| 9 | must take at [adv] one [noun] | 5 |
|
| 10 | must include at [adv] one [noun] | 5 |
|
