6.带疑问词的不定式短语 不定式前可以加某些疑问代词,如who、what、which,或疑问副词,如when、where、how、why等,构成一种特殊的不定式短语,可在句子中作主语、宾语、表语或状语等。 HowtoimproveEnglishisoftendiscussedamongthestudents. Wehaven’td ecidedwhentovisittheplace. Themostd ifficultthinginlearningEnglishishowtospeakthelanguagewell. Youhaven’tansweredmyquestionwheretogetthesebooks.