- I am Chinese.我是中国人。
- You are German.你们是德国人。
- He is a doctor.他是一名医生。
- This is an eraser.这是一块橡皮。
- The information is useful.这些信息很有用。
- You are very clever.你很聪明的
- They are playing basketball now.现在，他们正在打篮球。
- We're far from home. What are our parents doing at the moment? 现在，我们远离家了，我们的父母此刻在干什么呢？
- Mr Brian is visiting our village this month.这个月，布莱恩先生在我们村访问
- Listen! Our English teacher is singing the popular English song.听！我们英语老师正在唱那首流行的英文歌曲。
注意：一定要分v-ing是现在分词还是动名词！
be 动名词是“系表结构”，
e.g. Our task is building a new TV tower.我们的任务是建造一座新的电视塔。
因为task是不能发出“正在建设”的行为，所以从逻辑上可以判定谓语不能构成进行时态。
4.be 状语，表示地点，位置。- He is from Japan.他来自日本。
- The ticket is here.票在这儿。
- The apples are on the table.苹果在桌子上。
- He is to leave at eight o'clock this evening.他要在今晚八点钟离
- When love has gone away, whomever it has happened to, the only outlet is to give it up and let it go. 当爱远走，无论它是发生在自己或者对方身上，放弃和放手都是惟一的出路。
注意：
1.“is/are to be 过去分词”这种结构含有can be,must be的意思。
e.g. These rules of the roads are to be strictly observed.=These rules of the roads must be strictly observed.这些交通规则必须严格遵守。
2.“is/are not to be 过去分词”含有“禁止”的意思。
e.g. The magazines are not to be taken out of the reading-room.杂志不准带出阅览室。
3.用逻辑判别法把上述用法和be后的不定式作标语的情况区分开
e.g. The main aim is to get good results.主要的目的在于取的好成绩。
"to get good results"作表语。
6.be going 不定式，表示：“打算，计划，准备做......”- There is going to be a video conference tomorrow.明天准备召开一次电视会议。
- It is going to rain.天就要下雨了。
- She is about to have a baby in 8 month.她8个月后就会生小孩了。
- They are on the point of repairing the mobile phone.他们马上就修理这部手机。
- In the end he is certain to succeed.最后他必定成功！
- He is likely to win the game. 他很有可能赢得比赛.
- Such things are.这种情况是存在的。
- Be it late,I must finish this work.尽管晚了，但我仍须结束这项工作。
