发音双唇向前突出舌尖不触下齿发长音单词do two whocool fool tool blue glue truefruit juice suit lose move shoe food moon soongroup soup youinclude June ruleblew drew threwimprove prove remove句子The boy threw the tool.There are two blue suits.You should put on shoes.The moon is coming soon.We should improve food quality.同音[u:]flew flublew bluefew phewroot routetoo twoknew newcue queuewho’s whosethrew throughchews choose辩音[u:] [u] fool fullpool pullstewed stoodkook cook