| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] is useful [conj] it [verb] | 7 |
|
| 2 | [noun sg] is useful [conj] it [verb] | 6 |
|
| 3 | is [adv] useful [conj] it [verb] | 11 |
|
| 4 | is [adv] useful [conj] it [verb] | 11 |
|
| 5 | is useful [conj] it [verb] the | 5 |
|
| 6 | is useful [conj] it [verb] [art] | 5 |
|
| 7 | is useful [conj] it [verb] [art] | 5 |
|
| 8 | is useful [conj] it [verb] the | 5 |
|
