| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [v-ing] [verb] | 336 |
|
| 2 | it is n't [verb] | 176 |
|
| 3 | is n't [v-ing] [verb] | 141 |
|
| 4 | it is n't [v-ing] | 99 |
|
