“主-谓-宾”、“主-系-表”是英语的基本句型，主语领先句也是用得最多的句型。写作中为避免形式单一，当句子可以用主语开头，同时又可以其它结构开头时，不妨变换一下。
三年级英语作文大全经典范文一：
夏天
In the summer,the days are longer and the nights are shouter.It's very hot.People like to go swimming.I like swimming very much.So I often go to the swimming poll in the summer .And I can swim very well.
In the summer the trees and leaves are green.Flowers are open too.People don't like to go outside.They want to stay at home.Because in the room.It's very cool.
In the summer.People like to eat ice-cream.So there are many kinds of ice-cream.
I like swimming and I like eat ice-cream.So I like summer too.
三年级英语作文大全经典范文二：
夏天的夜晚
Summer night watching the sky and saw the moon climb the trees, the moon from the Earth's curved, like a boat into the round.
The sky from blue to black, the little stars climb the highest trees, and they smiled to me, blinked, lamb also went back to the laps. Presented by the green wall of trees in black, the Grand Canal echoing rumble of vehicles on the road, and occasionally still hear the dog barking sound.
三年级英语作文大全经典范文三：
I Hate Summer
In summer, the weather is hot, the air is humid, and the wind doesn't blow at all.
In summer, everything seems tired--except the mosquito and the fly. They are everywhere. They bring diseases to people. No one likes to walk or work under the summer sun. Because the wicked sun will burn your skin. So the hot summer confines you to your room. Hot weather makes me drowsy and I can't study effectively.
I hate summer. I wish it would go away quickly.
三年级英语作文大全经典范文四：
冬天
The weather in winter is a set of all the phenomena in a given atmosphere at a given time. It also includes interactions with the hydrosphere.
冬天的气候属于所有气象现象中的一种，是一定时期内大气层的现象。它同样包括水圈的相互作用。
The term usually refers to the activity of these phenomena over short periods (hours or days)， as opposed to the term climate, which refers to the average atmospheric conditions over longer periods of time. When used without qualification, weather" is understood to be the weather of Earth.
这个词通常指的是这些现象在短时间内(数小时或数天)的活动，而不是长期的气候，这是指在较长时间内的平均大气条件。使用时没有资格，天气“被理解为地球的天气。