| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [v-ing] [prep] [art] [noun] | 32 |
|
| 2 | must be [v-ing] [prep] [art] [noun] | 32 |
|
| 3 | must be [v-ing] [prep] [art] [noun] | 32 |
|
| 4 | must be [v-ing] [prep] [art] [noun sg] | 26 |
|
| 5 | must be [v-ing] [prep] the [noun] | 22 |
|
| 6 | must be [v-ing] [prep] the [noun] | 22 |
|
| 7 | must be [v-ing] [prep] a [noun] | 9 |
|
| 8 | must be [v-ing] [prep] a [noun] | 8 |
|
| 9 | must be [v-ing] in [art] [noun] | 6 |
|
| 10 | must be [v-ing] to [art] [noun] | 6 |
|
| 11 | must be [v-ing] in [art] [noun] | 6 |
|
| 12 | must be [v-ing] to [art] [noun] | 6 |
|
| 13 | must be [v-ing] [prep] [art] [noun pl] | 5 |
|
