| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who have [adv] heard [prep] | 23 |
|
| 2 | [Wh pn] have [adv] heard [prep] | 23 |
|
| 3 | [Wh pn] have [adv] heard of | 21 |
|
| 4 | [Wh pn] have [adv] heard of | 21 |
|
| 5 | [Wh pn] have never heard [prep] | 18 |
|
| 6 | [Wh pn] had [adv] heard [prep] | 12 |
|
| 7 | [Wh pn] have [adv] heard [prep] | 6 |
|
