| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] [v-ing] [art] | 1155 |
|
| 2 | [adv] [v-ing] at [art] | 567 |
|
| 3 | is [v-ing] at [art] | 247 |
|
| 4 | is [adv] at [art] | 216 |
|
| 5 | is [adv] [v-ing] at | 134 |
|
