I tried everything to lose weight with no success.
我试了各种方法减肥,但都没有成功。
I tried and tried (= kept making an effort ) and eventually I was offered a job.
我一次次地尝试,终于有人给了我一份工作。
Try as he might (= as hard as he could ) , he could not get the incident out of his mind.
他想尽办法,但脑子里仍摆脱不掉那件事。
vi. 尝试;努力;试验
experiment、
apply oneself、
struggle、
labor