| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | by refer to the [noun sg] | 21 |
|
| 2 | by refer to the [noun sg] | 21 |
|
| 3 | by refer [prep] the [noun sg] | 21 |
|
| 4 | by referring [prep] the [noun sg] | 21 |
|
