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