| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [Wh adv] [pers pn] [was/were] [v-ing] [prep] | 9 |
|
| 2 | [is] [Wh adv] [pron] was [v-ing] [prep] | 7 |
|
| 3 | 's [Wh adv] [pron] [was/were] [v-ing] [prep] | 7 |
|
| 4 | [is] why [pron] [was/were] [v-ing] [prep] | 6 |
|
