Brian says: Y sefyllfa dw i ynddi rwan The situation I am in now
In Welsh we cannot end a sentence with a preposition which does take the pronoun form to which it refers.
Ynddi: in it is used because it refers back to the word sefyllfa situation It is grammatically incorrect to say Y ty; dwi'n byw yn The house in which I live y ty; dw i'n byw ynddo Yr esgidau mae hi'n sefyll ynddyn nhw
The full forms of yn are: Yno i Ynot ti Ynddo fe Ynddi hi Ynddon ni Ynddoch chi Ynddyn nhw
Jac Whelan says: Dw i'n gwybod o brofiad neth wyt ti'n mynd trwyddo fo I know from experience what you are going through
Trwyddo fo though it. Again the it refers to profiad (a masculine noun)
The full forms of trwy are: Trwyddo i Trwyddot ti Trwyddi hi Trwyddo fe Trwyddon ni Trwyddoch chi Trwyddyn nhw
Note that often in speech trwy is pronounced drwy. Medru Brian asks Wendy: Sut fedri di gysgu? Fedri di is from the veb 'medru' to be able to. It is generally heard in North Walian dialects. In south Wales the form is gallu.
The full forms of medru in the present tense are: Mi fedra i Mi fedri di Mi fedrith o Mi fedrith hi Mi fedrwn ni Mi fedrwch chi Mi fedran nhw
The negative forms are Fedra i ddim and the Question Forms Fedra i?
Note that the answers will depend on the person for example:
Fedri di nofio - Medra/Na Fedra Fedrith o - Medrith/Na Fedrith Fedran nhw - Medran/Na fedran