| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [vb mod] be used | 610 |
|
| 2 | which can be used | 314 |
|
| 3 | which could be used | 130 |
|
| 4 | which will be used | 68 |
|
| 5 | which may be used | 49 |
|
| 6 | which would be used | 20 |
|
| 7 | which might be used | 12 |
|
| 8 | which should be used | 11 |
|
| 9 | which must be used | 5 |
|
