| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not [verb] a [noun sg] | 9078 |
|
| 2 | could [verb] a [noun sg] | 2367 |
|
| 3 | could not [verb] a | 847 |
|
| 4 | could not [verb] [noun sg] | 439 |
|
