DO/DOES (QUESTION)
...
DID (QUESTION)
...
HAVE/HAS + VERB
...
IF + PRESENT...WILL
...
IF + PAST...WOULD
...
HAD + VERB
...
WISH
...
SHOULD
...
MUST
...
MAY
...
DON'T/DOESN'T
...
DIDN'T
...
THERE WAS/THERE WERE
...
THERE IS/THERE ARE
...
CAN
...
COULD
...
