| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [is] [conj] [pron] [verb] | 2229 |
|
| 2 | [noun sg] [is] [conj] [pron] [verb] | 1809 |
|
| 3 | system [be] [conj] [pron] [verb] | 25 |
|
| 4 | system [is] [conj] [pron] [verb] | 23 |
|
