| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [adv] [v-ing] | 2153 |
|
| 2 | it [is] [adv] [not/n't] | 798 |
|
| 3 | it [is] [not/n't] [v-ing] | 780 |
|
| 4 | [is] [adv] [not/n't] [v-ing] | 113 |
|
