误I like to go for sail.
正I like to go for a sail.
析go for a sail是固定短语, sail前的不定冠词a不可省略。
老实告诉你,我一生中从未用独木舟航行过。误To tell you the truth,I have never been in a canoe under a sail in my life.
正To tell you the truth,I have never been in a canoe under sail in my life.
析under sail是习语,不加冠词a。
在晨光中,他们开船向海岛进发。误They set a sail to the islands in the early morning.
正They set sail for the islands in the early morning.
析set sail表示“开船”; set a sail表示“张帆”。