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