| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] be used [prep] | 37 |
|
| 2 | to have be used [prep] | 34 |
|
| 3 | [to-vb] been used [prep] | 34 |
|
| 4 | [to-vb] be used in | 11 |
|
| 5 | [to-vb] be used in | 11 |
|
| 6 | [to-vb] be used for | 11 |
|
| 7 | [to-vb] be used for | 11 |
|
| 8 | [to-vb] be used by | 10 |
|
| 9 | [to-vb] be used by | 10 |
|
