| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] been [verb] for | 36 |
|
| 2 | must [verb] been [v-ing] for | 18 |
|
| 3 | [vb mod] [verb] been looking for | 13 |
|
| 4 | [modal v] [verb] been looking for | 13 |
|
| 5 | must [verb] been looking [prep] | 6 |
|
| 6 | must [verb] been looking [prep] | 6 |
|
| 7 | must [verb] be looking for | 5 |
|
| 8 | must [verb] been look for | 5 |
|
| 9 | must [verb] [be] looking for | 5 |
|
| 10 | must [verb] been looking for | 5 |
|
| 11 | must [verb] been looking for | 5 |
|
| 12 | must [verb] [been] looking for | 5 |
|
