| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | if it [is] [adv] | 1448 |
|
| 2 | if it [is] not | 690 |
|
| 3 | if it [is] [not/n't] | 690 |
|
| 4 | [conj] it [is] n't | 594 |
|
| 5 | if it [be] n't | 476 |
|
| 6 | if [pron] [is] n't | 247 |
|
