| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] three years | 23 |
|
| 2 | it be three year | 23 |
|
| 3 | it [was/were] three year | 13 |
|
| 4 | it was three year | 13 |
|
| 5 | it [is] three year | 10 |
|
| 6 | it is three year | 8 |
|
