| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [not/n't] [verb] [prep] a [noun sg] | 2043 |
|
| 2 | could [verb] [prep] a [noun sg] | 727 |
|
| 3 | could [not/n't] [verb] a [noun sg] | 607 |
|
| 4 | could [not/n't] [verb] [prep] a | 174 |
|
| 5 | could [not/n't] [verb] [prep] [noun sg] | 164 |
|
