"自己尝试"可不可以译成"try with myself"??????

尝试一下，可以说:
have a try 或have a go
try 是一个不及物动词，所以后面不能直接加宾语，你的说法错误．
以后要注意词性呀

try by myself正规用法

try myself best
try by myself good
try with myself bad

不可以,应该用try by myself或try myself

不可以,应用have a try by myself.

不可以。
try myself基本上是chinglish的感觉。

某人自己尝试做某事：try (to do sth.) by oneself