| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [adv] [v-ing] a | 572 |
|
| 2 | [is] [adv] [v-ing] at | 166 |
|
| 3 | [is] [v-ing] at a | 92 |
|
| 4 | [adv] [v-ing] at a | 82 |
|
| 5 | [is] [adv] at a | 46 |
|
