Consonant-5.Voiceless consonants【f】

发音 上齿轻触下唇 声带不震动 单词 face fact fail fall family far feel few find safe self staff first follow for brief chief relief forget form from offer office often after before forever enough laugh tough 句子 I feel safe. We should follow way. The first offer is good. The family are from France. There is enough room in the office. 同音 flew flu for four fin Finn fair fare feet feat few phew flour flower foul fowl forth fourth 辨音 [f] [v] fan van fat vat fast vast file vile ferry very leaf leave life live safe save belief believe proof prove