| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they [verb] be [prep] | 551 |
|
| 2 | must [verb] be [prep] | 297 |
|
| 3 | they must [verb] [prep] | 166 |
|
| 4 | they must [verb] be | 124 |
|
| 5 | they must be [prep] | 51 |
|
