| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] used in [det] | 26 |
|
| 2 | have been used in [det] | 26 |
|
| 3 | has [been] used in [det] | 13 |
|
| 4 | have [been] used in [det] | 7 |
|
| 5 | have [been] used in some | 6 |
|
