主格 I we you you she/he/it they
宾格 me us you you her/him/it them
代词所有格 my our your your her/his/its their
名词性代词 mine ours yours yours hers/his/its theirs
be动词现在时 Am are are are is are
be动词过去时 was were were were was were
规则1 一般情况+s e.g. shell→shells toy→toys
规则2 以s, x, ch, sh结尾+es e.g. fox→foxes church→churches
规则3 以o结尾+s或+es e.g. radio→radios potato→potatoes
规则4 以f, fe结尾的，变f, fe为ves e.g. life→lives half→halves
规则5 以辅音字母+y结尾， 变y为i+es e.g. sky→skies study→studies
规则1 一般情况+s e.g. like-likes, look-looks
规则2 以s, x, ch, sh和o结尾+es e.g. do-does, catch-catches
规则3 以辅音字母+y结尾， 变y为i+es e.g. carry-carries, fly-flies
规则1 一般动词加-ing e.g. look-looking, read-reading, play-playing
规则2 以不发音的字母结尾的单词去e加-ing e.g. make-making, take-taking, arrive-arriving
规则3 重读闭音节词结尾， 即单词中只有一个元音字母，其后紧跟一个辅音字母的词，双写辅音字母再加-ing e. g. run-running, sit-sitting, get-getting, swim-swimming, stop-stopping
规则1 一般动词加-ed e.g. look-looked, watch-watched, play-played
规则2 以e结尾的加-d e.g. make-maked, arrive-arrived
规则3 以辅音字母y结尾的变y为i加-ed cry-cried, carry-carried
规则4 重读闭音节词结尾， 即单词中只有一个元音字母，其后紧跟一个辅音字母的词，双写辅音字母再加-ed stop-stopped
在清辅音后面(除外)读/t/ e.g. walked, jumped
在浊辅音和元音后读/d/ e.g. washed, watched
在/t/，/d/后读/id/ e.g. waited, hated
规则1 一般加-er e.g. high-higher
规则2 以e结尾加-r nice-nicer
规则3 以辅音字母加y结尾，变y为i再加-er busy-busier
规则4 重读闭音节结尾， 双写辅音字母再加-er fat-fatter
规则1 一般加-est e.g. high-highest
规则2 以e结尾加-st nice-nicest
规则3 以辅音字母加y结尾，变y为i再加-est busy-busiest
规则4 重读闭音节结尾， 双写辅音字母再加--est fat-fattest
is='s I am=I'm are='re
is not=isn't /iznt/ are not=aren't /a:nt/
将be动词变为过去式。am, is的过去式为was, are的过去式为were：
I was at the butcher's.
You were a student a year ago.
The teacher was very beautiful ten years ago.
Were you at the butcher's?
Were you a student a year ago?
Was the teacher very beautiful ten years ago?
I was not at the butcher's.
You were not a student a year ago.
The teacher was not very beautiful ten years ago.
Yes, I was. / No, I was not.
Yes, you were. / No, you were not.
Yes, he/she was. / No, he/she was not.
I finished my homework yesterday.
The boy went to a restaurant.
The Sawyers lived at King Street a year ago.
Did you finish your homework yesterday?
Did the boy go to a restaurant?
Did the Sawyers live at King Street a year ago?
I did not finish my homework yesterday.
The boy did not go to a restaurant.
The Sawyers did not live at King Street a year ago.
Yes, I did. / No, I didn't.
Yes, he did. / No, he didn't.
Yes, they did. / No, they did not.
He is a teacher.
The girl is very beautiful.
Tim and Jack are students.
Is he a teacher?
Is the girl very beautiful?
Are Tim and Jack students?
He is not a teacher.
The girl is not very beautiful.
Tim and Jack are not students.
Yes, he is. / No, he is not.
Yes, she is. / No, she is not.
Yes, they are. / No, they are not.