| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | the main reasons for [verb] | 16 |
|
| 2 | [art] main reasons for [verb] | 16 |
|
| 3 | [art] main reasons for [v-ing] | 16 |
|
| 4 | the main reasons for [verb] | 16 |
|
