| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [v-ing] [prep] [art] | 51 |
|
| 2 | must be [v-ing] [prep] [art] | 51 |
|
| 3 | must be [v-ing] [prep] the | 32 |
|
| 4 | must be [v-ing] [prep] a | 16 |
|
| 5 | must be [v-ing] in [art] | 8 |
|
| 6 | must be [v-ing] for [art] | 8 |
|
| 7 | must be [v-ing] to [art] | 8 |
|
| 8 | must be [v-ing] in [art] | 8 |
|
| 9 | must be [v-ing] for [art] | 8 |
|
| 10 | must be [v-ing] to [art] | 8 |
|
| 11 | must be [v-ing] at [art] | 6 |
|
| 12 | must be going [prep] [art] | 6 |
|
| 13 | must be [v-ing] at [art] | 6 |
|
| 14 | must be looking [prep] [art] | 5 |
|
