| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | do [not/n't] [vb infin] | 181325 |
|
| 2 | [not/n't] [vb infin] back | 752 |
|
| 3 | do [vb infin] back | 78 |
|
| 4 | do [not/n't] back | 9 |
|
