| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have been [v-ing] to | 38 |
|
| 2 | [modal v] have been [v-ing] [noun sg] | 37 |
|
| 3 | have been [v-ing] [noun sg] to | 33 |
|
| 4 | [modal v] have been [noun sg] to | 12 |
|
