in front of :在物體外面的前面.
in the front of ：在物體里面的前面.
a lot of = lots of (修飾可數(shù)與不可數(shù)名詞）
many :只可修飾可數(shù)名詞
much :只可修飾不可數(shù)名詞
be good at doing sth :擅長做某事
be good with sb :對某人好
help sb (to) do sth :幫助某人做某事
help each other :互相幫助
when I grow up :當我長大以后
tell sb to do sth :告訴某人做某事
tell sb about sth :告訴某人有關(guān)的事
ask sb to do sth :叫某人做某事
buy sth for sb :為某人買某物
例：I buy a white sweater for my mother .
buy sth from sb :從某人處買來某物
例：I buy a white sweater from clothes store .
sell sth to sb :賣某物給某人