| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | need to know [prep] | 137 |
|
| 2 | need know about | 101 |
|
| 3 | need know in | 8 |
|
| 4 | need know for | 6 |
|
| 5 | need know before | 5 |
|
