| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | systems be [conj] | 16 |
|
| 2 | systems [be] that | 12 |
|
| 3 | systems [be] [that] | 12 |
|
| 4 | systems [be] that | 12 |
|
| 5 | systems [is] [conj] | 10 |
|
| 6 | systems is [conj] | 10 |
|
| 7 | systems are [conj] | 6 |
|
| 8 | systems [am/are] [conj] | 6 |
|
