| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is not [adv] | 10031 |
|
| 2 | is [adv] back | 73 |
|
| 3 | [be] not back | 38 |
|
| 4 | be not back | 38 |
|
| 5 | [is] not back | 21 |
|
| 6 | is not back | 8 |
|
| 7 | is [not/n't] back | 8 |
|
