| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [is] [v-ing] | 27562 |
|
| 2 | [pron] [is] [prep] | 24341 |
|
| 3 | [pron] [prep] [v-ing] | 8730 |
|
| 4 | [is] [prep] [v-ing] | 3232 |
|
