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