| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [prep] the [noun] | 1265 |
|
| 2 | must be [prep] the [noun] | 183 |
|
| 3 | must be [v-ing] [prep] the | 32 |
|
| 4 | must be [v-ing] [prep] [noun] | 27 |
|
| 5 | must be [v-ing] the [noun] | 19 |
|
