1、Difficulties did not damp down his enthusiasm for study, and he would try his best to realize his dream.
困难没有熄灭他的学习热情，他会尽力实现自己的梦想。
2、President Zedillo was an able, honest man with a strong supporting team, and I was sure he would try his best to deal with these problems.
墨国总统塞迪略是一个能干、诚实的人，他身后有一支强大的支持队伍，我确信他会尽他所能处理这些问题。
3、It's true that your father will find it extremely difficult to get out of the habit of smoking, but he should try his best for health's sake.
确实，要你父亲改掉吸烟的习惯很难，但是为了健康，他应该尽力戒除。
4、He was determined to try his best at every practice, perhaps he'd get to play when he became a senior.
每场训练我都要拼尽全力，他暗下决心，等升到高年级说不定就能上场了。
5、A man with pursuit and goal will always try his best to make progress, no matter position he is in.
一个有追求、有目标的人总会尽他最大的努力去进步，不管他处于怎样的位置之上。
他尽力学好英语。追问
必须用try。。。但是还是谢谢你！会点赞的！
追答tried 是try 的过去式。
He 是第三人称单数，后面不可能用 动词原形 try
也可以用 单三形式 tries 。
He tries his best to learn English well .
或者造个否定句：
He didn't try his best. 他没有尽力。
tried
his
best
to
stop
her
leaving
the
school.
他已尽力阻止她离开学校.