| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] be used for [det] | 11 |
|
| 2 | [vb -s] been used for [det] | 11 |
|
| 3 | has be used for [det] | 10 |
|
| 4 | [vb -s] be used for many | 8 |
|
