i am sitting the chair? 我正坐在椅子上?需要后面跟on吗?什么时候应该跟on? 谢谢啊~

I’ am sitting down. 如何翻译? I am sitting down是什么时态 What were you doing this time yesterday?-I on the grass and drawing a picture.A.sit B.sat C.am sitting D.was sitting I am sitting by the river and watching the boys ( )括号中填swim还是swimming.为什么? 翻译,通顺一些的翻译 It is afternoon now,and I am sitting by the pool and drinking orange juice. i am just not used to sitting backwards on the train 的中文意思?...backwards 是背向前,u 一首外国歌曲歌词中有：I let you down . I am the sky ,the star ,the moon ,the sitting sun我要歌名 I am putting on my shoes是什么意思如题 还有 I am showing my mother around my school. Many students are sitting there. I am writing a letter. She is cleaning the blackboard at the back of the dassroom. The 翻译：I`m sitting by the window. am accustomed _____ late on weekends for I have the habit of working at night.I am accustomed _____ late on weekends for I have the habit of working at night.a、to sit upb、 to sitting upc、 at sitting upd、 for sitting up为什么? IF I am free this afternoon,I'll clean the sitting room对后面四个单词提问______will you____ if you are free this afternoon meet,friends,am,to,going,some,old,of,I,my （ .）排出正确的顺序,感谢大家~book,sitting,the,pool,boy,the,by,reading,and,is,a ( ?) 选择正确的be动词填空is,am,are1,he----working quietly2,you----sitting on the chair3,falling behind -----annpying4,i-----having a good day5what-----they doing? i am sitting the chair? 我正坐在椅子上?需要后面跟on吗?什么时候应该跟on? 谢谢啊~ I am sorry I am not in a position to answer this question.Ask the man sitting by the window .He is ______here.A.in charge B.liable C.reliable D.in power ( )The Greens____at table when I went inA:is sitting B:were sitting C:was sitting D:sat look at the photo,I'am sitting()my father and my motherLook at the photo,I'am sitting()my father and my mother and my bother is the tallest()all the people.a.between,among b.between,between c.among,among d.among,between The girl sitting between my mother and I is my sister. 问：sitting做什么成分