| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] on for a long | 5 |
|
| 2 | could [vb infin] [adv prt] for a long | 5 |
|
| 3 | could [verb] [adv prt] for a long | 5 |
|
| 4 | could go [adv prt] for a long | 5 |
|
| 5 | could go [adv prt] for a long | 5 |
|
