| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have be used for many year | 11 |
|
| 2 | have been used [prep] many year | 11 |
|
| 3 | have be used [prep] many year | 11 |
|
| 4 | have be used for many year | 11 |
|
| 5 | have be used [prep] many years | 11 |
|
| 6 | has be used [prep] many year | 7 |
|
