一般现在时
He is a young boy.肯 定句
He isn't a young boy.否定句
Is he a young boy?一般疑问句
Who is your friend?特殊疑问句
She is my friend.肯定句
She isn't my friend.否定句
Is she your friend?一般疑问句
What's your name?特殊疑问句
I'm a student.肯定句
I'm not a student.否定句
Are you a student?一般疑问句
What's your job?特殊疑问句
现在进行时
I'm reading a book.肯定句
I'm not reading a book.否定句
Are you reading a book?一般疑问句
What are you doing?特殊疑问句
Tom is playing football.肯定句
Tom isn't playing football.否定句
Is Tom playing football?一般疑问句
What's Tom doing?特殊疑问句
Lily is watching TV.肯定句
Lily isn't watching TV.否定句
Is Lily watching TV?一般疑问句
What's Lily doing?特殊疑问句
过去时
I was a little girl 10 years ago.肯定句
I wasn't a little girl last year.否定句
Were you a little girl?一般疑问句
What did you see last night?特殊疑问句
Bob ate 3 eggs this morning.肯定句
Bob didn't eat 3 eggs this morning.否定句
Did Bob eat 3 eggs this morning?一般疑问句
What did Bob eat this morning?特殊疑问句
Mary went to the park yesterday.肯定句
Mare didn't go to the park yesterday.否定句
Did Mary go to the park yesterday?一般疑问句
When did Mary go to the park?特殊疑问句