| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [that] [modal v] be [vb pp] | 1643 |
|
| 2 | [noun sg] system [modal v] be [vb pp] | 200 |
|
| 3 | system [that] [modal v] be [vb pp] | 28 |
|
| 4 | [noun sg] system [that] [modal v] be | 15 |
|
