| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [v-ing] [adv prt] at [art] | 105 |
|
| 2 | [was/were] [v-ing] at [art] time | 72 |
|
| 3 | [v-ing] [adv prt] at [art] time | 28 |
|
| 4 | [was/were] [adv prt] at [art] time | 14 |
|
