| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] [prep] | 4043 |
|
| 2 | [vb infin] think [prep] | 651 |
|
| 3 | must [vb infin] think | 121 |
|
| 4 | must think [prep] | 62 |
|
