一般过去时:
Simple Past Tense
English uses verbs in the simple past tense to refer to?actions, situations, or events that are finished and that?happened beforenow. Past forms: when I was ..., last week, day, year, etc., yesterday, ago (two weeks ago, three years ago, four months ago, etc.)
There are three ways to form?simple past tense in English.
1. 系动词wasandwere
Example: The students were very clever. /But one student was in trouble.
2. Regular verbs (They are called regular because they all add the same?ending--ed--or some variation on it.)
a) Add -d: increased, declined, liked, piled, seized, smiled, typed, plunged, lived
b) Change y to i and add -ed: apply / applied; bury / buried; cry / cried;try / tried
Note: If a regular verb ends in a consonant and y (or if?the final syllable of a regular verb ends in this way),?change the y to iand then add –ed
However, if a regular verb ends in a vowel and y (or if the?final syllable of a regular verb ends in this way),?do not change the y to iand then add -ed:
annoy / annoyed; dismay / dismayed; enjoy / enjoyed; ?obey / obeyed; play / played; stay / stayed
c) Add -ed: asked, belonged, clapped,?dialed, filled, guessed,? looked, marked,?needed, pulled, reached,?started, touched, viewed
d) If a regular verb ends in a single vowel and a single?consonant (except x), double the consonant before?you add -ed: drop/ dropped ;beg / begged; clap / clapped; fan / fanned;?hop / hopped; jog / jogged; mar / marred;
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