| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [be] signed up [prep] | 5 |
|
| 2 | has [be] sign up [prep] | 5 |
|
| 3 | [vb -s] be sign up [prep] | 5 |
|
| 4 | [vb -s] been sign up [prep] | 5 |
|
| 5 | [vb -s] [been] sign up [prep] | 5 |
|
| 6 | [vb -s] [be] sign up [prep] | 5 |
|
