| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] then [be] used for | 8 |
|
| 2 | [vb mod] then [be] used for | 8 |
|
| 3 | can then [be] used for | 5 |
|
| 4 | can then [be] used for | 5 |
|
