有些英语单词不懂,

有些英语单词不懂,
①all together;一起,总共.
We went to school trip all together last year.
There are 100 balls all together.
②and so on;等等.【这个词该怎么用,我一点都不懂啊!请哥哥姐姐举个例子给妹妹,
③as well;也,并,和,同.
④as well as;也,还,而且.
【大家可以帮我比较一下③和④这两个词吗?我两个都不会造句,还有...嗯..那个as...as..不是两者比较的一种表达形式吗?】
⑤(not)as...as...;（不）像……一样.
Her toy is as same as mine.
She is as beautiful as her sister.【可以这样造句吗?里面是形容词?】
⑥ask for;索要,要求.
She ask me for my homework.
She ask for my homework.【中间可以加人称代词吗?】
⑦at once;立即,马上.【这个词是用在前还是在后,可以再造句吗?】
He stoped his car at once.
At once,He stoped his car.
⑧at present;目前,现在.【可以说说它和 now ； at the momemtd 】
She is a school girl at present.
非常感谢另一个朋友，可惜只能选一个……对不起……（星星眼ing）