| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [be] [v-ing] for twenty [noun pl] | 9 |
|
| 2 | [verb] been [v-ing] for twenty [noun pl] | 9 |
|
| 3 | [verb] be [v-ing] for twenty [noun pl] | 9 |
|
| 4 | [verb] [been] [v-ing] for twenty [noun pl] | 9 |
|
| 5 | [verb] [be] [v-ing] for twenty years | 8 |
|
