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