Gweithgaredd 45

This is a defective or incomplete verb and doesn't have the full range of tenses:

Positive	Negative
Dylwn i	Ddylwn i ddim
Dylet ti	Ddylet ti ddim
Dylai  e/o	Ddylai e/o ddim
Dylai  hi	Ddylai hi ddim
Dylen  ni	Ddylen ni ddim
Dylech chi	Ddylech chi ddim
Dylen  nhw	Ddylen nhw ddim

 

When using the negative forms, the d takes a soft mutation and is replaced with a dd and ddim is also added, e.g.

Ddylwn i ddim aros yn rhy hir.

The table of mutations can be found by clicking here.

When using negative forms, verbs beginning with p,t,c take an aspirate mutation, e.g.

Chest ti ddim brechdan i ginio.

Phryniff hi mo'r y ffrog.

Theithiaf i ddim ar y bws.

The table of mutations can be found by clicking here.

perfformiwyd - The person completing the action of a verb, i.e. the subject, is not indicated in the suffix (ending) of an impersonal verb. 

-ir, -wyd and -id are the most commonly used suffixes for impersonal verb forms.

The impersonal verb forms can be shown as follows:

 

-ir	Gwelir	Present Tense	Gwelir clychau'r gog bob mis Mai.
-wyd	Gwelwyd	Past Tense	Gwelwyd eira yn ystod y gaeaf llynedd.
-id	Gwelid	Imperfect Tense	Gwelid gwiwerod coch mewn coedwigoedd ers talwm.

 

The normal sentence structure in Welsh is Verb + Subject + Object, e.g.

Rhedodd y ferch y ras.

Ysgrifennodd y bardd gerdd.

Dylai'r plant gael gwersi.

Perfformiodd Theatr y Waun Las y ddrama neithiwr.

However, sentences which include impersonal verbs do not follow this pattern. 

When using the impersonal tense, the object follows the verb and the subject/person completing the action is included after gan, e.g.

Rhedwyd ras gan y ferch.

Ysgrifennwyd y gerdd gan y bardd.

Perfformiwyd drama dda iawn gan Gwmni Theatr y Waun Las.

Note also that there is no soft mutation after an impersonal verb (unlike personal verbs), e.g.

Ysgrifennodd y bardd gerdd.

Ysgrifennwyd cerdd gan y bardd.

The table of mutations can be found by clicking here.

In Welsh the preposition must have a suffix (an ending) to match the pronoun that follows it, e.g.

i + nhw = iddyn (preposition) nhw (pronoun)

There is no suffix if the preposition is followed by a noun, e.g.
chwilio am y dillad, mynd i'r brifysgol.

The suffixes for the prepositions can be found by clicking here.

Mawr is an irregular adjective.   When using mawr in a superlative context, we use mwyaf.  The following forms are used:

Absolute	Equative as … as	Comparative e.g. better	Superlative e.g. best
da	cystal	gwell	gorau
drwg	cynddrwg	gwaeth	gwaethaf
mawr	cymaint	mwy	mwyaf
bach	cyn lleied / mor fach	llai	lleiaf
isel	mor isel	is	isaf
uchel	cyfuwch / mor uchel	uwch	uchaf