| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they could [vb infin] [adv prt] [prep] a | 9 |
|
| 2 | they could [verb] [adv prt] [prep] a | 9 |
|
| 3 | they could [verb] [adv prt] [prep] a | 9 |
|
| 4 | they could [verb] [adv prt] [prep] a | 9 |
|
