英语各种时态的句子结构？
英语有12种时态，分为四个时态组：简单时态、进行时态、完成时态和完成进行时态。以下是每种时态的句子结构及示例：
1. 简单现在时：主语+动词原形（第三人称单数变为动词原形+s/es）例句：I love pizza. （我喜欢披萨。）He studies English every day. （他每天学习英语。）
2. 简单过去时：主语+动词过去式例句：I walked to school yesterday. （昨天我走路去上学了。）She played tennis last weekend. （上个周末她打网球了。）
3. 简单将来时：主语+will/shall+动词原形例句：We will visit our grandparents next weekend. （我们下个周末要去看望祖父母。）He shall call you later today. （他今天晚些时候会给你打电话。）
4. 现在进行时：主语+be动词+动词-ing例句：I am watching a movie right now. （我正在看电影。）They are playing basketball in the park at the moment.（他们此刻正在公园里打篮球。）
5. 过去进行时：主语+was/were+动词-ing例句：I was reading a book when he called me yesterday afternoon.（昨天下午他给我打电话的时候，我正在看书。）They were walking in the rain when I saw them last night.（昨晚我见到他们的时候，他们正走在雨中。）
6. 将来进行时：主语+will be+动词-ing例句：This time next week, we will be sitting on the beach sipping cocktails!（下周这个时间点，我们将坐在沙滩上品尝鸡尾酒！）He will be waiting for you at the airport when you arrive tomorrow morning.（你明天早上到达机场的时候，他会在那里等你。）
7. 现在完成时: 主语 + have/has + 过去分词例句: I have visited Paris twice.(我已经去过巴黎两次了)She has written a novel.(她写过一本小说)
8 . 过去完成式: 主语 + had + 过去分词 例句: When they arrived, he had already left.(当他们到达的时候, 他已经走了)By that time, I had finished my homework.(那个时间点, 我已经做完作业了)
9 . 将来完成式: 主语 + will have + 过去分词 例句: By this time next year, we will have graduated from college.(明年这个时间点，我们就要从大学毕业了)I will have completed my project by Friday.(星期五之前我就会完成我的项目)
10 . 完成进行式: 主语 + have/has been + 动词 -ing例句: He has been studying English for five years.(他学英语已经五年了)They have been working on this project for months.(他们已经几个月都在做这个项目)
11 . 常用于虚拟条件从句中的情态动词would should could等：If students had more encouragement from their parents, they would perform better in school.. (如果学生得到更多来自父母的鼓励，他们会在学校表现更好) She said she could speak Spanish fluently (她说她能流利地讲西班牙语)
12 . 完成虚拟式常用情态动词should/could/would/might/have 后接have+p.p.If she had studied harder for the test, she would have passed it.(如果她更用功复习考试，就可以通过考试)
If he had come earlier, he could have seen the movie with us。(如果他早点到达，就可以和我们一起看电影了)
