| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] [art] [adj] system | 27 |
|
| 2 | is [verb] a [adj] system | 15 |
|
| 3 | is [verb] the [adj] system | 12 |
|
| 4 | is [verb] the [adj] system | 12 |
|
| 5 | is [to-vb] [art] [adj] system | 11 |
|
| 6 | is [verb] a [adj] system | 10 |
|
| 7 | is [v-ing] [art] [adj] system | 9 |
|
| 8 | is [vb pp] [art] [adj] system | 7 |
|
| 9 | is [verb] an [adj] system | 5 |
|
| 10 | is call [art] [adj] system | 5 |
|
| 11 | is called [art] [adj] system | 5 |
|
