He's been there twice before.就twice提问

He's been there twice before.就twice提问 he's been there (twice) before.(对括号单词提问） He has been there twice 划线提问twice he has been there [twice]就划线部分提问【 】he been there this is Sam's ___visit to Beijing.he hai been there twice be I have been there twice.(对划线部分提问)twice画线 ------ -------- --- he has been to the great wall twice.对twice提问 He has been to the Gread Wall twice twice 划线提问 I have been to Beijing twice.(就划线部分提问) i have been there twice he has been there teice （twice划线） I have been to Hong Kong twice.(twice划线提问)