Vous avez cherché: it would be a sin (Anglais - Gallois)

it would be
byddwn yn

it would be a diversion
byddai'n creu gwrthdyniad

it would be nice --
byddai'n braf --

it would be curtains
fe fydd wedi dibennu

it would be useful --
byddai'n ddefnyddiol --

it would also be a strategic mistake
byddai hefyd yn gamgymeriad strategol

that would be a mistake
byddai hynny'n gamgymeriad

in effect , it would be a voluntary tax
byddai hynny , i bob pwrpas , y dreth wirfoddol

that would be a big improvement
byddai hynny yn welliant mawr

it would be a great change from last year
byddai'n newid mawr o'r llynedd

having said that , it would be a nice addition
wedi dweud hynny , byddai'n braf ei gael

i thought it would be boring
roeddwn i'n meddwl y byddai'n ddiflas

checking would be a simple procedure
mater syml fyddai archwilio

it would be a serious decision to pass such a resolution
penderfyniad difrifol fyddai pasio peth felly

it would be a fitting tribute to them if it were restored
byddai'n deyrnged deilwng iddynt pe câi ei adfer

it would be a nightmare , and we will get bogged down by it
byddai'n beth hunllefus , a chaem ein llethu ganddo

it would be a good and effective monitoring role for chcs to perform
byddai'n rôl monitro dda ac effeithiol i'w chyflawni gan y cynghorau iechyd cymuned

it would be a key element in attracting manufacturing and distribution operations
byddai'n elfen allweddol er denu gweithfeydd gweithgynhyrchu a dosbarthu

clearly , it would be a serious matter if discourteous words were used
mae'n amlwg , byddai wedi bod yn fater difrifol pe bai geiriau anghwrtais wedi cael eu defnyddio

i told her that it would be a priority for the welsh conservative party
dywedais wrthi y byddai'n flaenoriaeth i blaid geidwadol cymru