| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | product [pron] [vb mod] be used | 5 |
|
| 2 | product which [modal v] be used | 5 |
|
| 3 | product which [modal v] be used | 5 |
|
| 4 | product [Wh det] [modal v] be used | 5 |
|
