| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [adv] by [noun] | 9 |
|
| 2 | must be [adv] by [noun] | 9 |
|
| 3 | must be [adv prt] by [noun] | 8 |
|
| 4 | must be [adv] by [noun prp] | 8 |
|
| 5 | must be in by [noun] | 7 |
|
| 6 | must be in by [noun] | 7 |
|
