| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [verb] been base on | 11 |
|
| 2 | [modal v] [vb infin] been base on | 11 |
|
| 3 | [modal v] [verb] been based on | 11 |
|
| 4 | [modal v] have been base on | 11 |
|
| 5 | [modal v] have been base on | 11 |
|
| 6 | may [verb] been base on | 5 |
|
| 7 | may [verb] been base on | 5 |
|
