| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] be traced [prep] [adj] | 14 |
|
| 2 | can be traced [prep] [adj] | 11 |
|
| 3 | can be traced [prep] [adj] | 11 |
|
| 4 | [modal v] be traced to [adj] | 7 |
|
