| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] be [pron] [to-vb] | 1516 |
|
| 2 | [pron] must be [pron] | 316 |
|
| 3 | must be [pron] [to-vb] | 15 |
|
| 4 | [pron] must be [to-vb] | 14 |
|
