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13.doauxv.&v.→(单三式)→(过去式)14.havev.→(单三式)→(过去式)15.gov.去;走→(单三式)→(过去式)

题目详情

13. do auxv. & v. → ____ (单三式) → ____ (过去式)

14. have v. → ____ (单三式) → ____ (过去式)

15. go v.去;走 → ____ (单三式) → ____ (过去式)

▼优质解答
答案和解析
13. does did   14. has had   15. goes went