| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [adv prt] [prep] a | 2568 |
|
| 2 | [v-ing] [prep] a period | 54 |
|
| 3 | [adv prt] [prep] a period | 54 |
|
| 4 | [v-ing] [adv prt] a period | 13 |
|
