Question

小学英语的基础知识，比如be动词，助动词，情态动词什么的，用法也详

小学英语的基础知识，比如be动词，助动词，情态动词什么的，用法也详细说出来，谢谢

Answer 1

1. be 动词有三个（am/ is/ are) 中文的意思：“是”，如：I am a nurse. 我是一个护士。He is a doctor. 他是一个医生。 We are good friends. 我们是好朋友。其否定句只要在这三个字面加上not; 一般疑问句只要把这三个字提前到句首，然后在句尾加上“？” 即可。
2....小学英语中助动词有两个（do/ does）否定形式是（don't/ doesn't）在句中与行为动词原形连用，构成疑问句或否定句结构。如：She sings well. She doesn't sing well. Does she sing well? We watch TV every day. We don't watch TV every day.
Do you watch TV every day?
3. 小学英语中情态动词有三个（may/ can/ must) 可以，能、会，必须，本身不能单独使用；同样要和行为动词原形一起连用才能构成句子谓语部分。否定句是在这三个字后面加“not” 一般疑问句时，把这三个字提到句首，句尾加"?". 如：We must go along the road on the right. We must play football in the street.
Must we hand in our homework now? May I come in? Can you swim?
I can't cook. I can wash my clothes.
希望能帮到你。