| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [vb pp] [adv] [subord] | 376 |
|
| 2 | [vb pp] [adv] [subord] [to-vb] | 279 |
|
| 3 | is [vb pp] [adv] [to-vb] | 223 |
|
