| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] it [is] | 13111 |
|
| 2 | it [is] [v-ing] | 7295 |
|
| 3 | [adv] [is] [v-ing] | 602 |
|
| 4 | [adv] it [v-ing] | 5 |
|
