| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should be [vb pp] [prep] | 9543 |
|
| 2 | they should be [vb pp] | 703 |
|
| 3 | they be [vb pp] [prep] | 59 |
|
| 4 | they should be [prep] | 48 |
|
