| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] [v-ing] [prep] twenty | 12 |
|
| 2 | [verb] [been] [v-ing] [prep] twenty | 12 |
|
| 3 | [vb -s] [been] [v-ing] [prep] twenty | 5 |
|
| 4 | [been] [v-ing] [pron] [prep] twenty | 5 |
|
| 5 | [been] [v-ing] [pers pn] [prep] twenty | 5 |
|
| 6 | [been] [v-ing] [prep] twenty [noun] | 9 |
|
| 7 | [been] [v-ing] [prep] twenty [noun pl] | 9 |
|
| 8 | [been] [v-ing] [prep] twenty years | 8 |
|
| 9 | [been] [v-ing] [prep] twenty year | 8 |
|
