| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should be [verb] on [art] [noun pl] | 32 |
|
| 2 | should be [vb pp] on [art] [noun pl] | 31 |
|
| 3 | should be base on [art] [noun pl] | 7 |
|
| 4 | should be based on [art] [noun pl] | 7 |
|
