| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | and if [vb pp] | 88 |
|
| 2 | and if [v-ing] | 22 |
|
| 3 | and if use | 7 |
|
| 4 | and if [vb base] | 7 |
|
| 5 | and if used | 6 |
|
| 6 | and if required | 6 |
|
| 7 | and if require | 6 |
|
