( 1. "paid a~ chwarae yn yr ardd" is potentially ambiguous as ) between 'don't play...' and 'stop playing...'. Is there any ( easy/idiomatic way of making the distinction if necessary? ) ( How do you say 'don't stop playing'? "Darfod", "gorffen", "rhoi'r gorau" are all possible translations for "stop" as opposed to "do not". "Darfod" has a sense of happening, completed; "gorffen" has the sense of completion, finishing; "rhoi'r gorau" is I suppose something like "give up". I would translate "don't stop playing" by "paid(/peidiwch) a rhoi'r gorau i chawarae". Then there's always "stopio", but the less said about that the better. ( 2. Given the difference between "mae hi'n cael gweld" ('she gets/ is ) allowed to see') and "mae hi'n cael ei gweld" ('she is seen'), does ( it follow that e.g. "mae hi'n cael ei nofio" doesn't exist (because ) the only possible reading is *'she gets swum')? If so, how would ( you say something like 'she gets HER swimming', with contrastive ) stress on 'her' ('she gets HER swimming every day, but he never gets ( HIS')? As it happens, "nofio" also means "to float" (in the watery, rather than financial sense) so "mae hi'n cael ei nofio" could be "she gets (herself) floated", "she is floated". "He gets her swimming" would be "mae e'n ei chael (hi) i nofio"... but of course that isn't the sense of the English sentence that you intended (but rather "he gets her to swim"). I would not try to translate what you wanted by such a sentence, but would go for "SHE swims" ("mae hi'n nofio") and emphasise the pronoun by substituting "hithau" -- "Mae hithau'n nofio'n feunyddiol, ond nid yw yntau byth." g