| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] not be obtained [prep] | 21 |
|
| 2 | [vb mod] not be obtained [prep] | 21 |
|
| 3 | can not be obtained [prep] | 15 |
|
| 4 | can not be obtained [prep] | 15 |
|
| 5 | could not be obtained [prep] | 5 |
|
| 6 | could not be obtained [prep] | 5 |
|
| 7 | not [verb] be obtained [prep] | 6 |
|
| 8 | not have be obtained [prep] | 6 |
|
| 9 | not [vb infin] be obtained [prep] | 5 |
|
| 10 | not have be obtained [prep] | 5 |
|
| 11 | not be obtained [prep] [art] | 6 |
|
| 12 | not be obtained [prep] [adj] | 6 |
|
| 13 | not be obtained [prep] [noun] | 6 |
|
| 14 | not be obtained [prep] [art] | 6 |
|
