| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should have [been] [v-ing] [prep] | 33 |
|
| 2 | [modal v] have [been] [v-ing] about | 20 |
|
| 3 | [vb mod] have [been] [v-ing] about | 20 |
|
| 4 | should have [been] [verb] about | 9 |
|
| 5 | should have [be] [v-ing] about | 5 |
|
| 6 | should have [been] [v-ing] about | 5 |
|
| 7 | should [verb] [been] [v-ing] about | 5 |
|
| 8 | should have [been] [v-ing] about | 5 |
|
| 9 | should [vb infin] [been] [v-ing] about | 5 |
|
