The sun rises in the east. (名词)
He likes dancing. (代词)
Twenty years is a short time in history. (数词)
Seeing is believing. (动名词)
To see is to believe. (不定式)
What he needs is a book. (主语从句)
It is very clear that the elephant is round and tall like a tree.
We study English.
He is asleep.
He is a teacher. (名词)
Seventy-four! You don’t look it. (代词)
Five and five is ten. (数词)
He is asleep. (形容词)
His father is in. (副词)
The picture is on the wall. (介词短语)
My watch is gone / missing / lost. (形容词化的分词)
To wear a flower is to say “I’m poor, I can’t buy a ring. ” (不定式)
The question is whether they will come. (表语从句)
常见的系动词有: be, sound(听起来)， look(看起来)， feel(摸起来)，smell(闻起来)，
taste(尝、吃起来)， remain(保持，仍是)， feel(感觉) ….
It sounds a good idea.
The sound sounds strange.
Her voice sounds sweet.
Tom looks thin.
The food smells delicious.
The food tastes good.
The door remains open.
Now I feel tired.
I like China. (名词)
He hates you. (代词)
How many do you need? We need two. (数词)
We should help the old and the poor.
I enjoy working with you. (动名词)
I hope to see you again. (不定式)
Did you write down what he said? (宾语从句)
Are you afraid of the snake?
Under the snow, there are many rocks.
He gave me a book yesterday.
Give the poor man some money.