| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [be] for [adj] [noun pl] | 28 |
|
| 2 | [be] useful for [adj] [noun pl] | 12 |
|
| 3 | [modal v] [be] useful for [adj] | 12 |
|
| 4 | [modal v] [be] useful for [noun pl] | 9 |
|
