"Is it windy today?"
Translation:Ydy hi'n wyntog heddiw?
Why is it "ydy" and not "oes"? What is the difference and when should they each be used?
Ydy...? is used to start a question as in the sentence - asking about some quality or property of something such as 'is the weather windy, wet, dry, etc?', 'is the car red/cheap/rusty?'
Oes...? is used to ask whether something is there, whether it exists:
- Oes gwynt heddiw? - Is there a wind today?
- Oes car coch ar y stryd? - Is there a red car on the street?
The two main uses for oes in this course is to express possession and necessity.
Oes car gyda chi? - 'Is there a car with you' which is transposed into English as:- Do you have a car?
Oes rhaid i chi fynd? - 'Is there a necessity for you to go?' which is transposed as:- Do you have to go/Must you go?
Oes is used to ask these questions in 1st, 2nd and 3rd person, singular and plural.
Ydy is the question form of bod = to be for the 3rd person singular in the present tense.
Ydy Dewi Lingo yn hoffi coffi? -Is Dewi Lingo liking coffee? -Does Dewi Lingo like coffee?
Ydy hi'n hoffi coffi? - Is she liking coffee? -Does she like coffee?