| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [v-ing] [prep] [adj] years | 147 |
|
| 2 | have been [v-ing] [prep] [num] years | 103 |
|
| 3 | have been [verb] [prep] twenty years | 9 |
|
| 4 | have been [v-ing] [prep] twenty [noun pl] | 9 |
|
| 5 | have been [v-ing] [prep] twenty [noun] | 9 |
|
| 6 | have been [v-ing] [prep] twenty years | 8 |
|
| 7 | have been [v-ing] [prep] twenty year | 8 |
|
| 8 | have [been] [v-ing] [prep] twenty years | 8 |
|
| 9 | have been [v-ing] [prep] twenty years | 8 |
|
| 10 | have [be] [v-ing] [prep] twenty years | 8 |
|
| 11 | [verb] been [v-ing] [prep] twenty years | 8 |
|
| 12 | have be [v-ing] [prep] twenty years | 8 |
|
