| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] they must be | 64 |
|
| 2 | [vb base] they must be | 29 |
|
| 3 | [vb past] they must be | 16 |
|
| 4 | think they must be | 13 |
|
| 5 | [vb pp] they must be | 12 |
|
| 6 | [verb] them must be | 8 |
|
| 7 | think they must be | 7 |
|
| 8 | [vb -s] they must be | 6 |
|
| 9 | know they must be | 6 |
|
| 10 | mean they must be | 5 |
|
| 11 | thought they must be | 5 |
|
