I'll say.

　　Definitely.

　　好像挺有意思。

　　Sounds like fun. *接受别人的邀请或建议时。

　　Let's go out! (我们出去玩吧。)

　　Sounds like fun. (那一定很有意思。)

　　当然!/一定!

　　You bet! *完全赞成对方所说的事的语气。

　　Did you study for the test? (快考试了，你准备了吗?)

　　You bet. (当然!/一定!)

　　That is for sure.

　　You know it.

　　I'd bet on it.

　　You can bet on it.

　　Bet on it.

　　Of course.

　　It goes without saying.

　　That goes without saying.

　　You betcha. *俚语。

　　你是反对还是赞成他的主意?

　　Are you for or against his idea?

　　好!

　　Good. *用来向对方表达愉快、批准、同意、满意等心情。

　　How is it? (这个怎么样?)

　　Good. (好!)

　　It's good.

　　太棒了!

　　Great! *比good更要强烈地表示“吃惊的、终于可以松一口气的心情”，还带有“得意洋洋”、“心满意足”的语感。

　　The boss approved my proposal. (老板同意了我的建议。)

　　Great! (太棒了!)

　　That's great!

　　好主意。

　　Good idea.

　　Let's do this part first. (我们先做这部分吧!)

　　Good idea. (好主意。)

　　Good thinking.

　　Bad idea. (馊主意。)

　　你说的有一部分是对的。

　　What you say is partly right. *partly “部分的”。

　　Don't you agree? (你同意吗?)

　　What you say is partly right. (你说的有一部分是对的。)

　　You are partially correct.

　　I agree with you partially. (我部分同意。)