mam i have a doubt ... Should MUST always follow HAVE.. Eg: That must HAVE been difficult for you.. why can't we use HAS in place of HAVE ?? since That is a singular..
anonymous mam i have a doubt ... Should MUST HAVE always follow HAVE MUST .. Eg: That must HAVE been difficult for you..
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anonymousmam i have a doubt ... Should
MUSTHAVE always followHAVEMUST.. Eg: That must HAVE been difficult for you.. why can't we use HAS in place of HAVE ?? since That is a singular..
Modal verbs (may, might, must, can, could, etc.) can only