| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] be at the forefront | 16 |
|
| 2 | [prep] [be] at the forefront | 16 |
|
| 3 | [prep] [be] at the forefront | 16 |
|
| 4 | to [be] at the forefront | 15 |
|
| 5 | to [be] at the forefront | 15 |
|
| 6 | [prep] be at the forefront | 15 |
|
| 7 | [prep] [be] at the forefront | 15 |
|
