语法总结
一般将来时安排未来行动
will sail, will set out, will be away, will take part in 都是按时间线写未来计划和事实安排。
相似句：
- We will leave at six tomorrow.
- She will join us after lunch.
现在完成时写船只的过往经历
It has sailed across the Atlantic many times 不是只讲过去某一次，而是概括截至现在已经多次完成的经历。
相似句：
- He has visited Beijing three times.
- This team has won many matches.
be away + 一段时间
如果要和 for two months 这类时间段连用，英语常把 leave 换成 be away 这种状态表达。
相似句：
- He will be away for a week.
- My father has been away for three days.
take part in 与 enter for
take part in 强调真正参加活动；enter for 更像“报名参加”。本课写的是实际参赛，所以用 take part in。
相似句：
- She took part in the meeting yesterday.
- He entered for the competition last month.