| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [vb pp] [verb] | 12789 |
|
| 2 | [modal v] be [verb] [v-ing] | 1072 |
|
| 3 | [modal v] [be] [vb pp] [v-ing] | 1023 |
|
