| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be used for [adj] purposes | 14 |
|
| 2 | [modal v] be used for [adj] purposes | 14 |
|
| 3 | [modal v] [be] used for [adj] purposes | 14 |
|
| 4 | [modal v] [be] used for [adj] purposes | 14 |
|
| 5 | [vb mod] [be] used for [adj] purposes | 14 |
|
| 6 | can [be] used for [adj] purposes | 6 |
|
| 7 | can [be] used for [adj] purposes | 6 |
|
