欢迎老师讲话用英语怎么说

To say "welcome" in English, you can use the phrase "welcome (to) [event or location]". This phrase is commonly used to greet someone who is new or visiting a particular event or location. For example, if you are welcoming a new student to your class, you could say "Welcome to our class!" (欢迎来到我们的班级！). This phrase comes from the Old English word "welcuma", which means "to receive with pleasure".
Here are some additional examples of how you can use the phrase "welcome (to) [event or location]" in English:
"Welcome to our team!" (欢迎加入我们的团队！)
"Welcome to our company's annual conference!" (欢迎来到我们公司年度会议！)
"Welcome to New York City!" (欢迎来到纽约市！)
Overall, using the phrase "welcome (to) [event or location]" is a simple and polite way to greet someone and make them feel welcome in a new setting.