| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | did [not/n't] [verb] | 57604 |
|
| 2 | did [not/n't] [vb infin] | 57468 |
|
| 3 | [verb] [not/n't] understand | 1820 |
|
| 4 | do [not/n't] understand | 1820 |
|
| 5 | did [adv] understand | 478 |
|
| 6 | did [not/n't] understand | 476 |
|
| 7 | [vb past] [not/n't] understand | 475 |
|
