| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] [v-ing] | 7370 |
|
| 2 | is [adv] [subord] | 1353 |
|
| 3 | [adv] [v-ing] [subord] | 693 |
|
| 4 | is [v-ing] [subord] | 216 |
|
