| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [not/n't] been used [prep] [det] | 8 |
|
| 2 | have [not/n't] be used [prep] [det] | 8 |
|
| 3 | have not be used [prep] [det] | 7 |
|
| 4 | have [not/n't] be used for [det] | 5 |
|
| 5 | have [not/n't] be used for [det] | 5 |
|
| 6 | has [not/n't] be used [prep] [det] | 5 |
|
