我一定要学好英语 I must learn English
我一定要好好学英语 I certainly must learn English
我一定要把英语学好 I will learn English
一定要学好英语
Be sure to learn English well
以上为机器翻译结果，长、整句建议使用 人工翻译 。
我想要环游世界，所以我一定要学好英语。
I want to travel around the world. So I must learn English well.
youdao
你一定要学好英语。
You must study English well.
因此，为了在工作上做的更加顺利，我一定要学好英语。
Therefore, in order to do better in my work, I must learn English well.
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