| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [v-ing] [art] | 2134 |
|
| 2 | [modal v] be [v-ing] [pron] | 1971 |
|
| 3 | be [v-ing] [pron] [art] | 814 |
|
| 4 | [modal v] be [pron] [art] | 26 |
|
