i seem to hear someone knocking at the door,knocking为什么要加ing

I seem to hear someone knocking at the door,系动词seem后面加动词的时候也要用不定式吗? i seem to hear someone knocking at the door,knocking为什么要加ing 请帮我划分一下这个句子的结构,I seem to hear someone knocking at the door. 烦请帮忙看看该选哪个,以及为什么这样选? 谢谢 I seem __ someone knocking at the door. A to hear,B hear I seem to really like you. i seem to have lost what RT. i seem to be boring等于什么 I seem to be a outsider I'm glad to hear I`m sorry to hear “I'm sorry to hear I seem to like I seem to like you这句英语是什么意思?教下哈 seem to seem to whenever i try to say them seem to make mistake .这句话对吗?seem to I want to hear again afraid to hear the 英语翻译Oooo baby,I hear how you spend night timeWrapped like candy in a blue,blue neon glowFade away and radiateOooo baby,watchful linesVibrate soft in brainwave timeSilver pictures move so slowGolden tubes faintly glowElectric faces seem to mer I can't seem to think of anything else翻译