has,have,had 用于什么时态?
HAS/HAVE用于现在完成时,形式是其后加DONE的动词形式,第一/二人称 ,复数人称都用HAVE,第三人称单数用HAS
HAD是用于过于完成时,后面也是加DONE的动词形式,任何人称都用HAD
他们改为疑问句和否定句,肯定回答和否定回答 又要怎么弄?
如：I have CDs.(改为一般疑问句)＿Do you have CDS?/Have you (got) CDS?＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿?
Mike has a tennis racket.(改为一般疑问句,并做否定回答)
＿Does mike have a tennis racket?No,he doesn't.＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿
She has a TV.(否定句)
_____She does not have a TV./ She has not a TV.
They have video cassettes.(否定句)
They do not have video cassettes./ They haven't videp cassettes._____________________________________