| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] [be] a good source | 12 |
|
| 2 | [noun pl] [be] a good source | 12 |
|
| 3 | [noun pl] be a good source | 12 |
|
| 4 | [noun pl] [am/are] a good source | 9 |
|
| 5 | [noun pl] are a good source | 9 |
|
