| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [adv] been [v-ing] to | 11 |
|
| 2 | has [adv] be [v-ing] to | 6 |
|
| 3 | has [not/n't] be [v-ing] to | 5 |
|
| 4 | has not be [v-ing] to | 5 |
|
