| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] [is] | 1318 |
|
| 2 | be [v-ing] [is] | 1318 |
|
| 3 | [am/are] [v-ing] [is] | 875 |
|
| 4 | are [verb] [is] | 399 |
|
| 5 | are [v-ing] [be] | 285 |
|
