| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [pron] [prep] [pron] | 190 |
|
| 2 | it must be [prep] [pron] | 26 |
|
| 3 | must be [pron] [prep] [pron] | 25 |
|
| 4 | it must be [pron] [prep] | 18 |
|
| 5 | it must be [pron] [pron] | 8 |
|
