| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] [be] [verb] [prep] | 326 |
|
| 2 | [vb mod] [vb infin] [be] think [prep] | 29 |
|
| 3 | [modal v] [vb infin] [be] think [prep] | 29 |
|
| 4 | must [vb infin] [be] think [prep] | 8 |
|
| 5 | must [verb] [be] think [prep] | 8 |
|
