| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it should be [prep] | 147 |
|
| 2 | should be [noun sg] [prep] | 138 |
|
| 3 | it should be [noun sg] | 30 |
|
| 4 | it should [noun sg] [prep] | 5 |
|
