| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should be [vb pp] [prep] | 9543 |
|
| 2 | [noun pl] should be [vb pp] | 5054 |
|
| 3 | [noun pl] be [vb pp] [prep] | 454 |
|
| 4 | [noun pl] should be [prep] | 207 |
|
