| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [vb infin] [pron] is [verb] | 15 |
|
| 2 | should [verb] [Wh det] is [verb] | 11 |
|
| 3 | should [verb] what is [verb] | 11 |
|
| 4 | should [verb] what is [verb] | 11 |
|
| 5 | should [verb] [pron] is [v-ing] | 9 |
|
| 6 | should [verb] [pron] is [vb pp] | 6 |
|
