| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but it [is] not | 1777 |
|
| 2 | but it [is] not | 1577 |
|
| 3 | but it is not | 995 |
|
| 4 | but it 's not | 782 |
|
| 5 | but it [is] n't | 200 |
|
