| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may be [verb] [prep] | 8068 |
|
| 2 | [vb mod] be obtain [prep] | 939 |
|
| 3 | [modal v] be obtain [prep] | 939 |
|
| 4 | may [be] obtain [prep] | 178 |
|
| 5 | may be obtain [prep] | 178 |
|
| 6 | may be obtain [prep] | 178 |
|
