| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] [modal v] [vb infin] | 492 |
|
| 2 | [is] [verb] [modal v] [vb infin] | 174 |
|
| 3 | [is] [vb pp] [modal v] [verb] | 148 |
|
