| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [v-ing] [pron] | 3262 |
|
| 2 | is it [pron] | 554 |
|
| 3 | is it [v-ing] | 346 |
|
| 4 | it [v-ing] [pron] | 141 |
|
