| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] it must be | 47 |
|
| 2 | [pron] it must be | 47 |
|
| 3 | [Wh det] it must be | 38 |
|
| 4 | what it must be | 31 |
|
| 5 | what it must be | 31 |
|
| 6 | which it must be | 7 |
|
| 7 | which it must be | 7 |
|
| 8 | [pers pn] it must be | 6 |
|
