| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] have be [v-ing] | 10895 |
|
| 2 | [pron] must have be | 1982 |
|
| 3 | [pron] must be [v-ing] | 543 |
|
| 4 | must have be [v-ing] | 289 |
|
