| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [prep] | 14380 |
|
| 2 | [modal v] be obtain | 1307 |
|
| 3 | be obtain [prep] | 1131 |
|
| 4 | [modal v] obtain [prep] | 50 |
|
