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