| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have sign up for | 34 |
|
| 2 | have signed [adv prt] for | 34 |
|
| 3 | have sign [adv prt] for | 12 |
|
| 4 | has sign [adv prt] for | 12 |
|
| 5 | had sign [adv prt] for | 7 |
|
