| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is because [adj] | 67 |
|
| 2 | is whether [adj] | 38 |
|
| 3 | is as [adj] | 19 |
|
| 4 | is if [adj] | 8 |
|
| 5 | is [subord] necessary | 6 |
|
