| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] be [v-ing] for three years | 11 |
|
| 2 | [verb] be [v-ing] for three year | 11 |
|
| 3 | have be [v-ing] for three year | 11 |
|
| 4 | [verb] been [v-ing] for three year | 11 |
|
| 5 | [vb -s] be [v-ing] for three year | 8 |
|
| 6 | has be [v-ing] for three year | 7 |
|
