This resource is provided by AmeriCymru and is intended for Welsh learners who are not yet ready to commit to a full time course. With Croeseiriau Cymraeg you can devise your own schedule and learn at your own pace. Before you start please go to this page: Croeseiriau Cymraeg and read the 'Introduction' and 'How to Use' sections.

If you are ready to commit to a full time course we recommend the following options:

AmeriCymraeg This is an online course with tutor John Good, which is offered in two-month terms. Go here for more information and to register: AmeriCymraeg

SSIW Want to learn quickly? Then you might want to check out the SSIW High Intensity Language Program here: SSIW

Online Welsh language course





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ymchwilio - to enquire, to investigate, to research

  • ymchwilio - to enquire, to investigate, to research

    sample sentence: 

    (G)allwn i ddim gweld y cychod gwenyn ond wnes i ddim stopio i ymchwilio!

    I couldn't see the hives but I didn't stop to investigate!

    Image: cychod gwenyn



    Dwi'n ymchwilio - I am investigating

    Wyt ti'n ymchwilio - You are investigating (familiar)

    Mae e'n ymchwilio / Mae hi'n ymchwilio - He / She is investigating

    Dyn ni'n ymchwilio - We are investigating

    Dych chi'n ymchwilio - You (plural) are investigating (also singular formal)

    Maen nhw'n ymchwilio - They are investigating




    Dwi ddim yn ymchwilio - I am not investigating

    Dwyt ti ddim yn ymchwilio - You are not investigating (familiar)

    Dydy e ddim yn ymchwilio / Dydy hi ddim yn ymchwilio - He / She is not investigating

    Dyn ni ddim yn ymchwilio - We are not investigating

    Dych chi ddim yn ymchwilio - You (plural) are not investigating (also singular formal)

    Dyn nhw ddim yn ymchwilio - They are not investigating




    Ydw i'n ymchwilio? - Am I investigating?

    Wyt ti'n ymchwilio? - Are you investigating? (familiar)

    Ydy e'n ymchwilio / Ydy hi'n ymchwilio? - Is he / Is she investigating?

    Ydyn ni'n ymchwilio? - Are we investigating?

    Ydych chi'n ymchwilio? - Are you (plural) investigating? (also singular formal)

    Ydyn nhw'n ymchwilio? - Are they investigating?




    Ydw i'n ymchwilio? - (Nac) Wyt / (Ydych - formal)

    Wyt ti'n ymchwilio? - (Nac) Ydw

    Ydy e'n ymchwilio / Ydy hi'n ymchwilio? - (Nac) Ydy

    Ydyn ni'n ymchwilio? - (Nac) Ydyn / Ydych

    Ydych chi'n ymchwilio? - (Nac) Ydyn / (Ydw - formal)

    Ydyn nhw'n ymchwilio? - (Nac) Ydyn



    N.B. 'Wyt ti' is the familiar form of the 2nd person and should be used only when addressing close friends, family members and animals. 'Dych chi' is the polite form and should be used in all other instances.