| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [is] [adj] [conj] it | 507 |
|
| 2 | [noun sg] [is] useful [conj] [pron] | 19 |
|
| 3 | [noun sg] [be] useful [conj] it | 11 |
|
| 4 | [noun] [is] useful [conj] it | 10 |
|
