| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [not/n't] been to | 121 |
|
| 2 | have been extend to | 39 |
|
| 3 | have [not/n't] been extend | 10 |
|
| 4 | [not/n't] been extend to | 6 |
|
