| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [v-ing] [prep] | 26019 |
|
| 2 | [was/were] [v-ing] [to-vb] | 9889 |
|
| 3 | [v-ing] [to-vb] [prep] | 8747 |
|
| 4 | [was/were] [to-vb] [prep] | 2385 |
|
