| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should be [vb pp] [adv] [adv] | 222 |
|
| 2 | be [vb pp] [adv] [adv] [to-vb] | 128 |
|
| 3 | should be [vb pp] [adv] [to-vb] | 41 |
|
