| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] look at [art] | 427 |
|
| 2 | [vb mod] look at [art] | 427 |
|
| 3 | must [verb] at [art] | 93 |
|
| 4 | must look [prep] [art] | 81 |
|
| 5 | must look [prep] [art] | 81 |
|
| 6 | must look at [art] | 32 |
|
| 7 | must look at [art] | 32 |
|
| 8 | must look at [art] | 32 |
|
