| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have be [vb pp] [prep] [det] | 2781 |
|
| 2 | must be [vb pp] [prep] [det] | 404 |
|
| 3 | must have be [vb pp] [prep] | 238 |
|
| 4 | must have [vb pp] [prep] [det] | 63 |
|
| 5 | must have be [prep] [det] | 26 |
|
