| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] useful if [art] | 12 |
|
| 2 | be useful if [art] | 12 |
|
| 3 | be useful if [art] | 7 |
|
| 4 | [be] useful if [art] | 7 |
|
| 5 | [adv] useful if [art] | 6 |
|
| 6 | [adv] useful if [art] | 6 |
|
| 7 | useful if [art] [noun] | 14 |
|
| 8 | useful if [art] [noun sg] | 12 |
|
