| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not be [verb] [prep] | 805 |
|
| 2 | [modal v] not be obtain [prep] | 21 |
|
| 3 | could [adv] be obtain [prep] | 14 |
|
| 4 | could not [be] obtain [prep] | 5 |
|
| 5 | could not be obtain [prep] | 5 |
|
| 6 | could not [be] obtain [prep] | 5 |
|
| 7 | could not be obtain [prep] | 5 |
|
| 8 | could [not/n't] be obtain [prep] | 5 |
|
| 9 | could not be obtain [prep] | 5 |
|
