| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [v-ing] [prep] twenty | 12 |
|
| 2 | have be [v-ing] [prep] twenty | 12 |
|
| 3 | have be [v-ing] for twenty | 12 |
|
| 4 | have be [v-ing] for twenty | 12 |
|
