| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it should [vb infin] a [noun sg] | 41 |
|
| 2 | it should [verb] a [noun sg] | 41 |
|
| 3 | it should have a [noun sg] | 11 |
|
| 4 | it should have a [noun sg] | 11 |
|
| 5 | it should provide a [noun sg] | 6 |
|
| 6 | it should provide a [noun sg] | 6 |
|
