| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] [art] | 32030 |
|
| 2 | be [v-ing] when | 373 |
|
| 3 | [v-ing] when [art] | 203 |
|
| 4 | be when [art] | 56 |
|
