| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should be [vb pp] [prep] | 9543 |
|
| 2 | be [vb pp] [prep] [noun pl] | 7236 |
|
| 3 | should be [vb pp] [noun pl] | 31 |
|
| 4 | should be [prep] [noun pl] | 24 |
|
