| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may be [verb] [prep] | 8067 |
|
| 2 | may be [vb pp] [prep] | 7735 |
|
| 3 | [modal v] be obtained [prep] | 938 |
|
| 4 | may be obtained [prep] | 178 |
|
| 5 | may [be] obtained [prep] | 178 |
|
| 6 | may be obtain [prep] | 178 |
|
| 7 | may [be] obtained [prep] | 178 |
|
