| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have been wait [prep] | 12 |
|
| 2 | [modal v] have been wait [prep] | 12 |
|
| 3 | [modal v] have been waiting [prep] | 12 |
|
| 4 | must have been wait [prep] | 6 |
|
| 5 | must have been wait [prep] | 6 |
|
