| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been used for [adj] years | 12 |
|
| 2 | have be used for [det] years | 12 |
|
| 3 | have be used for many years | 11 |
|
| 4 | have be used for many years | 11 |
|
| 5 | has be used for [adj] years | 7 |
|
