fall off同义词Fall down 和fall off的意思相同吗？

Question 1
fall down：英语解释【to be shown to be not sure or not good enough】
不实,不能令人满意,不够好.
例句：And that's where the theory falls down.这就是该理论的不足之处.
fall off ：英语解释【decrease in quantity or quality】
数量减少,质量下降.
例句：Attendance at my lectures has fallen off considerably.听我讲课的学生大大减少了.
fall over ：英语解释【(of a computer or program)to stop working suddenly】
（计算机或程序）突然发生故障.
例句：My spreadsheet keeps falling over.我的电子制表软件不断出故障.
fall into ：英语解释【to be able to be divided into sth】
可以分为,能够分成.
例句：My speech naturally falls into three parts.我的演讲可以自然地分成三部分.
Question 2
choose C
因为有一个or,使得to make people grow taller 和 to make people shorter是并列关系..
Question 3
much,even,still,far,a little是比较常用的.
Question 4
不能.
too...to...表示“太.而不能.",句意：箱子太重了小男孩提不动.省略了”to carry“,原句应该是”The box is too heavy for the litter boy to carry“

fell off

fall off是上什的意思,fall down是突然倒下的意思

fall down:I watch as the book falls down the building.
in fall:The leaves turn red in fall.
fall off:Stay away from the edge,you don't want to fall off that cliff.
fall asleep:I always fall asleep in class.
as..as possible:I'll try to get home as soom as possible.

意思：(fall off) become detached and drop to the ground:
例句：my sunglasses fell off and broke on the pavement
fall off 前面加上那个具体掉下来的东西就行了.fall off 一般指东西挂不住了,或者粘不住了,或者一不小心松开了,然后掉到地上了.我自己的理解就是东西“自己”自主地掉下来了.不是被人扔出去的.
比方说,the flower pot fell off.就是指它自己莫名其妙掉下来的,或者人非故意地把它推到地上.
再如,前面主语是人的话,he fell off the bike.也只这个人不当心,或者一下子走神了,或者突然间受打击了,总知是魂不守舍地摔了.

fall off 是从某物上跌落下来,off有脱离的意思,比方说从树上掉下就可以用.
fall to 不是固定用法,就是掉到...的意思,比如 fall to the ground
fall down是跌倒的意思,表示失去原有的平衡,但没有脱离支撑物.比如墨水瓶翻倒.

land from:从……降落
fall off是跌落,下降,减少,衰退,离开的意思比如说从梯子上摔下来等等.
instead of后边动词加ing

Tom fell off his bike yesterday.
TOM昨天从自行车上摔倒了.
fall 的过去式是fell哦.