Mae ateb cwestiwn uniongyrchol yn Gymraeg yn debyg i ateb cwestiwn yn llawn yn Saesneg
Answering a direct question is generally like answering in full in English.

Questions beginning with: Answers
  Bod (to be) - Present and Perfect (wedi) Tense
Ydw i? Am/do I..? Wyt/Nac wyt (nagwyt) Yes you are/do/No you aren’t/don’t.
Wyt ti?  Are/do you..? Ydw/Nac ydw (nagw) Yes I am/do/No I’m not/don’t.
Dych chi? Are/do you..? (sing.) Ydw/Nac ydw (nagw) Yes I am/do/No I’m not/don’t.
Dych chi? Are/do you..? (plur.) Ydyn/Nac ydyn (nagyn) Yes we are/do/No we aren’t/don’t.
Ydy e/hi? Is he/she/it..? Ydy/Nac ydy (nady/nagyw) Yes he/she it is/does/No he/she it isn’t.
Ydyn nhw? Are/do they..? Ydyn/Nac ydyn (nagyn) Yes they are/do/No they aren’t/don’t          .
Oes? Is/are there..? Oes/Nac oes (nagôs) Yes there are/No there aren’t/don’t.
 
  Bod (to be) - Imperfect Tense
O’n i? Was I..?           O’t/Nac o’t (nagôt) Yes you were/No you weren’t.
O’t ti? Were you..? (sing.) O’n/Nac o’n (nagôn) Yes I was/No I wasn’t.
O’ch chi? Were you..? (plur./form.) O’n/Nac o’n (nagôn) Yes we were/No we weren’t.
Oedd e/hi? Was he/she/it..? Oedd/Nac oedd (nagôdd) Yes he/she/it was/No he/she/it wasn’t.
O’n ni? Were we..? O’ch/Nac o’ch (nagôch) Yes you were/No you weren’t.
O’n nhw? Were they..? O’n/Nac o’n (nagôn) Yes they were/No they weren’t.
 
  Bod (to be) - Future Tense
Fydda i? Will I (be)..? Byddi/Na fyddi Yes you will (be)/No you won’t (be).
Fyddi di? Will you (be)..? Bydda/Na fydda Yes I will (be)/No I won’t (be).
Fyddwch chi? Will you (be)..? (sing.) Bydda/Na fydda Yes I will (be)/No I won’t (be).
Fyddwch chi? Will you (be)..? (pl./form.) Byddwn/Na fyddwn Yes we will (be)/No we won’t (be).
Fydd e/hi? Will he/she/it (be)..? Bydd/Na fydd Yes he/she/it will (be)/No… won’t (be).
Fyddwn ni? Will we (be)..? Byddwch/Na fyddwch Yes you will (be)/No you won’t (be).
Fyddan nhw? Will they (be)..? Byddan/Na fyddan Yes they will (be)/No they won’t (be).
 
  Bod (to be) - Conditional Tense
Fyddwn i? Would I (be)..? Byddet/Na fyddet Yes you would(be)/No you wouldn’t(be)
Fyddet ti? Would you(be)..? Byddwn/Na fyddwn Yes I would(be)/No I wouldn’t(be).
Fyddech chi? Would you(be)..? (sing.) Byddwn/Na fyddwn Yes I would(be)/No I wouldn’t(be).
Fyddech chi? Would you(be)..? (pl.form.) Bydden/Na fydden Yes we would(be)/No we wouldn’t(be).
Fyddai fe/hi? Would he/she/it(be)..? Byddai/Na fyddai Yes he/she/it would/No he/she wouldn’t
Fydden ni? Would we(be)..? Byddech/Na fyddech Yes you (be) would /No you wouldn’t.
Fydden nhw? Would they(be)..? Bydden/Na fydden Yes they would (be)/No they wouldn’t.
 
  Cael (to get/to have)- Future/Present Tense
Ga(f) i..? May I (have)..? Cei/Na chei (singular) Yes you may (have)/no you may not.
Ga(f) i..? May I (have)..? Cewch/Na chewch (plur/form.) Yes you may (have)/no you may not.
Gaiff e/hi..? May he/she (have)..? Caiff/Na chaiff Yes he/she may (have)/no… may not.
Gawn ni..? May we (have)? Cewch/Na chewch Yes they may (have)/no they may not.
Gân nhw..? May they (have)? Cân/Na chân Yes they may (have)/no they may not.
 
  Gwneud (to do/make) - Future Tense
Wnei di? Will you..? Gwnaf/Na wnaf Yes I will/no I won’t
Wnewch chi? Will you..? (plur./form.) Gwnaf/Na wnaf Yes I will/no I won’t

Dim ond dwy eithriad sydd, lle bydd atebion Cymraeg yn wahanol i atebion llawn Saesneg:

1) Yr Amser Gorffennol

Est ti mas? Welon nhw’r gêm? - Do / Naddo
Did you go out? Did they see the game? - Yes / No

2) Cwestiynau Pwysleisiol

Mas est ti? Nhw yw’r gorau? Nyrs yw e? - Ie / Nage
Out you went? THEY are the best? A nurse he is? - Yes / No

Dyw cwestiynau pwysleisiol ddim yn dechrau gyda berf. Yn syml, byddwch chi'n gwneud cwestiwn pwysleisiol mewn unrhyw amser, drwy symud rhan y cwestiwn byddwch chi eisiau ei physleisio i ddechrau'r frawddeg. Pan fydd hyn yn digwydd, Ie / Nage fydd yr atebion, ni waeth beth fydd yr amser, e.e:

Y Presennol
Wyt ti’n nyrs?               Are you a nurse?                  Ydw/Nac ydw

Y Presennol - Gyda phwyslais
Nyrs wyt ti?                   A nurse you are?                  Ie/Nage
(enw yn gyntaf – 'nyrs' / 'nurse')

Y Gorffennol
Aeth Ffred?                     Did Ffred go?                        Do/Naddo

Y Gorffennol - Gyda physlais
Ffred aeth?                      Ffred went?                            Ie/Nage
(enw'n gyntaf – 'Ffred')

Yr Amherffaith
Oedd e yn y dre?               Was he in town?                 Oedd/Nac oedd

Yr Amherffaith - Gyda phwyslais
Yn y dre (r)oedd e?          In town he was?                  Ie/Nage
(adferf yn gyntaf - ‘lle’, hynny yw 'yn y dre' / 'in town')

There are two exceptions to Welsh answers being like full English answers:

1)         Past Tense yes and no, e.g.

Est ti mas?  Welon nhw’r gêm?  Do/Naddo
Did you go out?   Did they see the game?

2)         Emphatic yes and no, e.g.

Mas est ti?  Nhw yw’r gorau?  Nyrs yw e?   Ie/Nage
Out you went?   They were the best?       A nurse he is?

Emphatic questions are those which do not start with a verb. An emphatic question can be formed in any tense by putting what you are emphasising first. When this happens the answers are always Ie/Nage regardless of the tense, e.g:

Present
Wyt ti’n nyrs?     Are you a nurse?     Ydw/Nac ydw

Emphatic
Nyrs wyt ti?      A nurse you are?      Ie/Nage
(noun first - nurse)

Past
Aeth Ffred?     Did Ffred go?     Do/Naddo

Emphatic
Ffred aeth?     Ffred  went?       Ie/Nage
(noun first - Ffred) 

Imperfect
Oedd e yn y dre?    Was he in town?   Oedd/Nac oedd

Emphatic
Yn y dre (r)oedd e?  In town he was?   Ie/Nage
(adverb 1st - ‘where’)