can i come in对吗

can i come in对吗 I woud like you can come这样说对吗? I expect my friends can come my school对吗? Can I come to your home?这句话对吗? Can i come in?的同义句 Can I come in?改为肯定句 Can I come in?的回答 May/Can/Am/Shall I come in? Can I come in?的意思 PLEASE Come In .I HOPE You Can Help Me! the door is l___ ,so I can't come in. May i come in中的May可以换成Can吗?