| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | he must [vb infin] at | 8 |
|
| 2 | he must [verb] at | 8 |
|
| 3 | he must be at | 5 |
|
| 4 | he must [be] at | 5 |
|
| 5 | he must [be] at | 5 |
|
| 6 | he must be at | 5 |
|
