A) details about the time or place that an action occured are given or requested.
B) the time of an action is not important or not specified.
C) the time of an action is important or specified

A) details about the time or place that an action occured are given or requested.
B) the time of an action is important or specified
C) the time of an action is not important or not specified.

A) Present Perfect
B) Simple Past

A) Simple Past
B) Present Perfect

A) They describe a fact or situation that is definite, probable, possible, or impossible from the speaker's point of view.
B) Details about the time or place that an action occured are given or requested.
C) Modals of speculation are modal auxiliary verbs which express degrees of certainty.

A) Commonly used modals for past and future
B) Commonly used modals for present and future events
C) Commonly used modals for past and present events

A) may, might, must, will, could
B) he, she, it
C) is, are

A) subject - modal verb - (negation) - main verb-| object/complement
B) subject - verb to be - verb
C) Did- subject- verb-complement-?

A) to talk about things that happened or existed before now.
B) a link between the present and the past. The time of the action is before now but not specified, and we are often more interested in the result than in the action itself.

A) to talk about things that happened or existed before now.
B) a link between the present and the past. The time of the action is before now but not specified, and we are often more interested in the result than in the action itself.