| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] let [pron] know | 268 |
|
| 2 | must let [pron] [verb] | 36 |
|
| 3 | must let [pron] [vb infin] | 36 |
|
| 4 | must [verb] [pron] know | 7 |
|
| 5 | must let [pron] know | 7 |
|
