| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] if we ca [adv] [vb infin] | 5 |
|
| 2 | [vb base] if we ca [not/n't] [verb] | 5 |
|
| 3 | [vb base] if we ca not [verb] | 5 |
|
| 4 | [vb base] if we ca n't [verb] | 5 |
|
