| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they must [verb] | 1627 |
|
| 2 | they must [vb infin] | 1624 |
|
| 3 | they [modal v] go | 817 |
|
| 4 | [pron] must go | 643 |
|
| 5 | they must go | 28 |
|
