| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] at [art] | 93 |
|
| 2 | must [vb infin] at [art] | 93 |
|
| 3 | must [verb] at the | 84 |
|
| 4 | must look at [art] | 32 |
|
| 5 | must look at [art] | 32 |
|
| 6 | must [verb] at a | 7 |
|
| 7 | must start at [art] | 6 |
|
| 8 | must start at [art] | 6 |
|
| 9 | must remain at [art] | 5 |
|
| 10 | must remain at [art] | 5 |
|
