Introduction to ArtificiaI Intelligence in Higher Education
A time to remember. (SIMPLE PAST)
1. A TIME TO REMEMBER
PRESENTA: BASILIO GARCÍA LOTZIN.
2. THE IMPORTANCE OF TIME
• Verb tense expresses the time of an event or
action. Time and how it is expressed in
writing is very important to English readers.
3. The Simple Past
We use the simple past to indicate exactly
when an action or event took place in the past.
I visited my sister yesterday.
We went out to dinner last night.
4. The Simple Past
The simple past is used to describe actions
and/or events that are now completed and no
longer true in the present.
I attended B.A in 2002. (I no longer attend B.A.)
I saw a movie every weekend when I was a
teenager. (I don’t see movies very much
anymore.)
5. SPELLING OF THE REGULAR PAST TENSE.
• We know that all regular verbs end in “ED” in the past
tense and that “ED” is pronounced “T” “D” or “ID”. Here
are the rules for spelling the regular past tense.
6. RULE # 1.
• The majority of verbs add “ED” with no other changes.
• E.g.
• DRESS……………DRESSED WORK…………….WORKED
• WASH…………….WASHED WANT……………WANTED
• CALL………………CALLED REST……………RESTED
7. RULE # 2.
• When the simple form ends in “E” we add only “D”.
• E.g.
• DANCE……………DANCED INVITE…………….INVITED
• LIVE…………….LIVED INCLUDE……………INCLUDED
• SMOKE………………SMOKED PLACE……………PLACED
8. RULE # 3.
• When the simple form of the verb ends in a consonant preceded
by a single accented vowel, the final consonant is doubled before
adding “ED”.
• E.g.
• STOP……………STOPPED PERMIT…………….PERMITTED
• PREFER…………….PREFERRED ADMIT……………ADMITTED
• SLAP………………SLAPPED OMIT……………OMITTED
9. RULE # 3A.
• There is NO DUPLICATION when the accent DOES NOT fall on the
last syllable or when there is a DOUBLE vowel before the final
consonant.
• E.g.
• WAIT……………WAITED OPEN…………….OPENED
• CLEAN…………….CLEANED ORDER……………ORDERED
• RAIN………………RAINED ANSWER……………ANSWERED
10. RULE # 3B.
• The final “W”, “X”, or “Y” are never doubled.
• E.g.
• SLOW……………SLOW ED ENJOY…………….ENJOYED
• RELAX…………….RELAXED PLAY……………PLAYED
11. RULE # 4.
• When the simple form ends in a “Y” preceded by a consonant,
the “Y” changes to “I” before adding “ED”.
• E.g.
• STUDY……………STUDIED CRY…………….CRIED
• MARRY…………….MARRIED HURRY……………HURRIED
12. PRONUNCIATION IN THE PAST TENSE OF
REGULAR VERBS.
1. Verbs ending in the sounds “D”
or “T”
1. The ED ending is pronounced
ID ( as an additional syllabale.
2. Verbs ending in the sounds S,
SH, CH, X, K, P, or GH (F).
2. The ED ending is pronounced
T ( without adding an additional
syllable).
3. All other verbs 3. The ED ending is pronounced
D ( without adding an additional
syllable).