友人が事故で死んだ後はバイクには乗っていないって英語でなんて言うの？

By putting the phrase "After the death of my friend in a motorcycle accident" at the beginning of the sentence, it emphasizes just how much the death of your friend has affected you. I hope that this helps :)

The past participle of 'to ride' is 'ridden' not 'rode' as indicated by another anchor. If your friend died in an accident and you did not ride a motorbike since that time, then you may use the above exampled sentence

Usually talking about death is taboo; to say outright that "my friend died on one" is somewhat aggressive and destabilizing unless supported by the outside context. Saying something like, "lost his life" might make it easier for the storyteller and audience to relate without discomfort. Ridden is the past tense of 'ride'; rode is also past tense, but you're talking about a continuous amount of time so it is better to say 'have ridden' than 'have rode'.

This is a standard way to express this idea in American English. In this case, 'the moment' means 'as soon as' or 'very close to the time', rather than literally 'the second he died.' In this sentence, 'mine' implies 'motorcycle' since the preceding clause provides the necessary meaning when it mentions 'motorcycle'. To use the word 'motorcycle' twice would sound awkward and redundant. 'Lost his life' is just another (perhaps more polite way) to say 'died'. I hope that this is useful to you in your ongoing study of the English language.

"After my friend died in an accident I haven't ridden a motorcycle" 'ridden' is used when talking about past tense, for present and future tense, to ride and riding. "Since my friend died in an accident i have been too frightened to ride a motorbike" To be 'Frightened' is an expression used when you are scared, more used in a formal sense.

Having lost a friend in a motorcycle accident is a very traumatic experience and you want to express that this is why you stopped riding. You can say something like "I'm afraid to ride a motorcycle after what happened to my friend" or "I won't ride a motorcycle anymore ever since what happened". By using i'm afraid and I won't they will let the listener know that you are serious and upset about what happened.