| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [vb pp] on [art] [noun] | 69 |
|
| 2 | must [be] [vb pp] on [art] [noun] | 69 |
|
| 3 | must [be] [vb pp] on [art] [noun sg] | 63 |
|
| 4 | must [be] [vb pp] on the [noun] | 54 |
|
| 5 | must [be] [vb pp] on the [noun] | 54 |
|
| 6 | must [be] [vb pp] on a [noun] | 14 |
|
| 7 | must [be] [vb pp] on a [noun] | 12 |
|
| 8 | must [be] based on [art] [noun] | 11 |
|
| 9 | must [be] served on [art] [noun] | 5 |
|
| 10 | must [be] [vb pp] on [art] [noun pl] | 5 |
|
| 11 | must [be] [vb pp] on [art] basis | 5 |
|
| 12 | must [be] [vb pp] on [art] basis | 5 |
|
