| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [adv prt] at | 2544 |
|
| 2 | be [v-ing] [adv prt] | 2146 |
|
| 3 | be [v-ing] at | 857 |
|
| 4 | be [adv prt] at | 190 |
|
