| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should have [been] [v-ing] about | 5 |
|
| 2 | should have [been] [v-ing] about | 5 |
|
| 3 | should [vb infin] [been] [v-ing] about | 5 |
|
| 4 | should [verb] been [v-ing] about | 5 |
|
| 5 | should [verb] [been] [v-ing] about | 5 |
|
