| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [modal v] [adv] [vb infin] | 347 |
|
| 2 | is [vb pp] [modal v] [vb infin] | 143 |
|
| 3 | is [vb pp] [modal v] [adv] | 61 |
|
| 4 | is [modal v] [adv] [vb infin] | 6 |
|
