Welsh/Grammar/Prepositions

Prepositions that cause a soft mutation
These prepositions cause a soft mutation.

Personal forms
Prepositions in Welsh, unlike many other European languages, may have personal forms for each pronoun. For example, the preposition 'ar' (on) must become 'arnaf i' for (on me).

Mewn v. Yn
Mewn is used for indefinite situations. Yn is used for definite situations. Generally, mewn can be translated as in a.

e.g Dwi'n mynd mewn awyren.

I'm going in an aeroplane.

Ti'n gweithio mewn siop.

You work in a shop.

Ô'n i'n gwneud prawf cemeg yn yr ysgol heddiw.

I did a chemistry test in the school today.

By preposition
AR
 * gwrando ar | Mae e'n gwrando ar y radio.
 * gweiddi ar | Pam wyt ti'n gweiddi arna i?
 * sylwi ar | [eg]
 * gwenu ar | [eg]
 * edrych ar | Gad i ni edrych ar y teledu.

AT
 * anfon at | [eg]
 * edrych ymlaen at | [eg]
 * mynd at | [eg]
 * ysgrifennu at | [eg]

I
 * mynd i

WRTH
 * dweud wrth

YN
 * credu yn
 * ymddiried yn

Â
 * siarad â
 * peidio â

By verb-noun
Gweithio:
 * Gweithio i (work for)
 * Gweithio ar (work on [something])

Siarad:
 * Siarad â (speak to/with)

Dod:
 * Dod ymlaen (to get on/to get along)