| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [prep] [art] [noun sg] | 2546 |
|
| 2 | must have been [art] [noun sg] | 266 |
|
| 3 | must have been [prep] [art] | 91 |
|
| 4 | must have been [prep] [noun sg] | 25 |
|
| 5 | must have [prep] [art] [noun sg] | 5 |
|
