| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been used for [det] year | 12 |
|
| 2 | have be used for [det] years | 12 |
|
| 3 | have be used for many year | 11 |
|
| 4 | has be used for [det] year | 7 |
|
