Verbnouns that don't take 'i'

In Welsh, as in English, sometime the word 'i' (to) is used to link two verbs, e.g. 'dw i'n mynd i sgwennu' (I'm going to write). There are, though, a number of verbnouns which are never followed by 'i', the second verbnoun just follows straight on, e.g. 'dw i'n ceisio cofio' (I'm trying to remember). 

Many of these words are very common, so it is a good idea to print out this list and refer to it when translating until you've got used to using these verbnouns without the preposition 'i'.

addo	to promise
anghofio	to forget
afer	to use, to be accustomed to
blino	to become tired
bwriadu	to intend
bygwth	to threaten
casáu	to hate
cofio	to remember
cychwyn	to begin, to start
dechrau	to begin
dewis	to choose
disgwyl	to expect
dymuno	to wish
dysgu	to learn
eisiau	to want, to need
gallu	to be able
gobeithio	to hope
gofyn (see note below)	to ask
gorffen	to finish
gwrthod	to refuse
haeddu	to deserve
hoffi	to like
meddwl	to think
methu	to fail
moyn /mofyn	to want, to need
mwynhau	to enjoy
mynnu	to insist
ofni	to fear
peidio	to cease, to stop
penderfynu	to decide, toresolve
setlo	to settle
synnu	to wonder, to surprise
trefnu	to arrange, to organise
trio	to try
ymarfer	to practice
ystyried	to consider


Note: Gofyn (to ask) has a particular construction where it is followed by a noun and a verbnoun with no second preposition, e.g. Dan ni wedi gofyn i Sioned ddod, (we have asked Sioned to come). The second verbnoun also undergoes soft mution.