| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [not/n't] | 23627 |
|
| 2 | it [is] [v-ing] | 7295 |
|
| 3 | [is] [not/n't] [v-ing] | 3504 |
|
| 4 | it [not/n't] [v-ing] | 18 |
|
