| Term | Definition |
| yn fy marn i | in my opinion |
| rydw i'n meddwl bod .... yn | I think that ...... is |
| rydw i'n meddwl ei fod e'n ......... | I think that he is ...... |
| rydw i'n meddwl ei bod hi'n ........ | I think that she is ......... |
| rydw i'n meddwl eu bod nhw'n ....... | I think that they are ....... |
| dydw i ddim yn meddwl bod ....... | I don't think that ...... |
| hoffwn i weld | I would like to see |
| hoffwn i gael | I would like to have |
| hoffwn i wisgo | I would like to wear |
| hoffwn i ddim gweld | I would not like to see |
| hoffwn i ddim cael | I would not like to have |
| hoffwn i ddim gwisgo | I would not like to wear |
| dylen ni gael | we should have |
| dylai fod | there should be |
| dylai rhieni | parents should |
| dylai plant | children should |
| dylai'r cyngor | the council should |
| basai'n well gyda fi ...... | I would prefer .... |
| ar y llaw arall | on the other hand |
| gallen ni | we can |
| mae'n rhaid i in | we must/have to |