1.it 指前面已經(jīng)提到過的人或事物，有時指心目中的或成為問題的人或事物，作真正主語。
例如：
What’s this? -It is a sheep? 這是什么??這是一只綿羊。
Who is it? -It’s me (I). 誰??是我。
It’s the wind shaking the window. 是風刮得窗戶響。
2.it指時間、季節(jié)。一般用在無人稱動詞的主語。
例如：
What time is it? -It’s nine. 幾點了??九點了。
It’s time for the meeting. Let’s go. 開會的時間到了，我們走吧。
What day is today? -It’s Saturday. 今天星期幾??今天星期六。
What’s the date today? -It is October 1st.
今天是幾號? ?今天是十月一日。
What season is it? -It is summer. 現(xiàn)在是什么季節(jié)??是夏季。
3.it 指氣候。一般作無人稱動詞的主語。
例如：
Is it cold in this room? -No, it isn’t. 屋里冷嗎??不冷。
What’s the weather like today? -It is fine.
今天天氣怎么樣??是晴天。
It often rains in summer and it often snows in winter in this city.
這個城市夏天經(jīng)常下雨，冬天經(jīng)常下雪。
4.it指距離、情況等。一般用作無人稱動詞的主語。
例如：
It is five kilometers from my home to the school.
從我家到學校有五公里。
It is very near from this factory to that one.
從這個工廠到那個工廠非常近。
It is a long way to the sea. 離海很遠。
Is it well with you? 你身體好嗎?
例如：
What’s this? -It is a sheep? 這是什么??這是一只綿羊。
Who is it? -It’s me (I). 誰??是我。
It’s the wind shaking the window. 是風刮得窗戶響。
2.it指時間、季節(jié)。一般用在無人稱動詞的主語。
例如：
What time is it? -It’s nine. 幾點了??九點了。
It’s time for the meeting. Let’s go. 開會的時間到了，我們走吧。
What day is today? -It’s Saturday. 今天星期幾??今天星期六。
What’s the date today? -It is October 1st.
今天是幾號? ?今天是十月一日。
What season is it? -It is summer. 現(xiàn)在是什么季節(jié)??是夏季。
3.it 指氣候。一般作無人稱動詞的主語。
例如：
Is it cold in this room? -No, it isn’t. 屋里冷嗎??不冷。
What’s the weather like today? -It is fine.
今天天氣怎么樣??是晴天。
It often rains in summer and it often snows in winter in this city.
這個城市夏天經(jīng)常下雨，冬天經(jīng)常下雪。
4.it指距離、情況等。一般用作無人稱動詞的主語。
例如：
It is five kilometers from my home to the school.
從我家到學校有五公里。
It is very near from this factory to that one.
從這個工廠到那個工廠非常近。
It is a long way to the sea. 離海很遠。
Is it well with you? 你身體好嗎?