| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | i have bought a | 37 |
|
| 2 | i 've bought a | 16 |
|
| 3 | i had bought a | 11 |
|
| 4 | i have bought a | 6 |
|
| 5 | i 'd bought a | 5 |
|
