| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have [been] [v-ing] [prep] a | 25 |
|
| 2 | [vb mod] have [been] [v-ing] [prep] a | 25 |
|
| 3 | might have [been] [v-ing] [prep] a | 6 |
|
| 4 | might have [been] [v-ing] [prep] a | 6 |
|
| 5 | may have [been] [v-ing] [prep] a | 5 |
|
| 6 | must have [been] [v-ing] [prep] a | 5 |
|
| 7 | must have [been] [v-ing] [prep] a | 5 |
|
| 8 | may have [been] [v-ing] [prep] a | 5 |
|
| 9 | have [been] [v-ing] [pron] [prep] a | 5 |
|
| 10 | have [been] [v-ing] [prep] a [noun] | 14 |
|
| 11 | have [been] [v-ing] [prep] a [noun sg] | 14 |
|
| 12 | have [been] [v-ing] [prep] a [adj] | 11 |
|
| 13 | have [been] [v-ing] [prep] a [adj] | 11 |
|
