| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] it [be] [adv] | 246 |
|
| 2 | [v-ing] it [be] [adv] | 205 |
|
| 3 | [is] [v-ing] it [adv] | 101 |
|
| 4 | [is] [v-ing] it [be] | 64 |
|
| 5 | [is] [v-ing] [be] [adv] | 27 |
|
