如果句中没有实义动词,则要用be动词.
He is at home.
若有实义动词,要构成疑问句或否定句则需加助动词.
Do you want to go to a movie?
在特殊疑问句中,如果疑问词作主语,即使实义动词作谓语也不需加助动词.如
Who teaches you English?
如果句中没有实义动词,则要用be动词.
He is at home.
若有实义动词,要构成疑问句或否定句则需加助动词.
Do you want to go to a movie?
在特殊疑问句中,如果疑问词作主语,即使实义动词作谓语也不需加助动词.如
Who teaches you English?