| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] to understand [pron] is [v-ing] on | 6 |
|
| 2 | [noun sg] to understand [pron] is [v-ing] on | 5 |
|
| 3 | to understand [pron] is [v-ing] on [prep] | 6 |
|
| 4 | to understand [pron] is [v-ing] on [prep] | 6 |
|
