| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] left [pers pn] [prep] | 8 |
|
| 2 | must [vb infin] left it [prep] | 7 |
|
| 3 | must have left [pron] [prep] | 7 |
|
| 4 | must [vb infin] left it [prep] | 7 |
|
