| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should be [verb] [prep] | 9907 |
|
| 2 | should be [vb pp] [prep] | 9543 |
|
| 3 | [modal v] be provided [prep] | 479 |
|
| 4 | should be provide [prep] | 104 |
|
| 5 | should [be] provided [prep] | 103 |
|
