| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have be [vb pp] [prep] three year | 18 |
|
| 2 | have be [vb pp] [prep] three years | 18 |
|
| 3 | have be [vb pp] [prep] three year | 18 |
|
| 4 | have been [vb pp] [prep] three year | 18 |
|
| 5 | have be [vb pp] for three year | 14 |
|
| 6 | have be [vb pp] for three year | 14 |
|
| 7 | has be [vb pp] [prep] three year | 11 |
|
| 8 | had be [vb pp] [prep] three year | 5 |
|
