| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] | 300938 |
|
| 2 | be [v-ing] | 300893 |
|
| 3 | was [verb] | 272459 |
|
| 4 | [was/were] [v-ing] | 103140 |
|
