| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | means that they must [vb infin] | 5 |
|
| 2 | means [that] they must [vb infin] | 5 |
|
| 3 | means that they must [vb infin] | 5 |
|
| 4 | means [conj] they must [vb infin] | 5 |
|
