| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | how [vb base] teacher [vb infin] | 6 |
|
| 2 | how [verb] teachers [vb infin] | 6 |
|
| 3 | how do teacher [vb infin] | 6 |
|
| 4 | how do teacher [vb infin] | 6 |
|
