| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [verb] be | 24572 |
|
| 2 | [verb] be [v-ing] | 21170 |
|
| 3 | [modal v] be [v-ing] | 15842 |
|
| 4 | [modal v] [verb] [v-ing] | 4704 |
|
