| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [verb] [pron] | 1960 |
|
| 2 | could [adv] [vb infin] [pron] | 1950 |
|
| 3 | [modal v] [adv] let [pron] | 176 |
|
| 4 | could [adv] let [pron] | 70 |
|
| 5 | could [adv] let [pron] | 13 |
|
