| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [modal v] [adv] [vb infin] | 347 |
|
| 2 | [is] [vb pp] [modal v] [vb infin] | 148 |
|
| 3 | [is] [vb pp] [modal v] [adv] | 63 |
|
| 4 | [is] [modal v] [adv] [vb infin] | 29 |
|
