| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | would [verb] [be] useful | 15 |
|
| 2 | would have [be] useful | 15 |
|
| 3 | would [verb] be useful | 15 |
|
| 4 | would [verb] [been] useful | 15 |
|
| 5 | would have [be] useful | 15 |
|
| 6 | would [vb infin] [be] useful | 15 |
|
| 7 | would [verb] been useful | 15 |
|
