| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [adv] [v-ing] | 2153 |
|
| 2 | [vb -s] it [is] [adv] | 534 |
|
| 3 | [vb -s] it [is] [v-ing] | 203 |
|
| 4 | [vb -s] [is] [adv] [v-ing] | 12 |
|
