i never catch anything—not even old boots 请问这个扩折号起什么作用 后边跟的不是句子时段短语

why I have never catch the happiness this never worry me.和 I didn't catch anything.有没有错误 i never catch anything-not even old boots 这里not前的-是什么意思,为什么用not 不是don't I catch a cold I can catch the I could not catch i _____(catch)insects - 　　catch　　 one's 　　heart ,　never　　 be　 apart . Catch one's heart,never be apart! catch one 's heart ,never be I never i never ,hard I work ,I never seem to be able to catch up with others . A whatever B whenever C wherever D However i think ill catch you i think ill catch you I never catch anything-not even old boots甚至连old boots都没有 那为什么不是no而是not呢,no不是才表示“没有”吗 catch me if i fall的歌词中 you will never that someone我听音乐中唱的是you will neve be that someone哪句对? can you catch what the teacher said in the english class .sorry,i can ___ understand it.1.hardly 2.almost 3.nearly 4.never