| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which have be used for | 22 |
|
| 2 | which [verb] be used for | 22 |
|
| 3 | which [verb] been used for | 22 |
|
| 4 | which had be used for | 10 |
|
| 5 | which [vb past] be used for | 10 |
|
| 6 | which [vb -s] be used for | 7 |
|
| 7 | which has be used for | 7 |
|
| 8 | which have be used for | 5 |
|
| 9 | which [vb base] be used for | 5 |
|
