The dog came bounding out...

1. I believe 'forms' is a typo of the word 'foams'.
'Foams' may be used colloquially for foam mattress.
'Sit on foams' may mean 'sit on foam mattress'.

望月一都, can you provide references for forms meaning '矮矮的、無背的板凳'?


2. bound, intransitive verb, meaning to run with long steps, especially in an enthusiastic way.
(http://oald8.oxfordlearnersdictionaries.com/dictionary/bound_2)

bound, verb intransitive, meaning to move by leaping, bounce, or rebound.
(http://www.merriam-webster.com/dictionary/bound)

'The dog came bounding towards us' is good enough but I won't say 'bound out' is incorrect. bound out 只是表逹釋放出來，(從屋內或拴狗頸之皮帶)


3. Only (b) 'Alcohol shouldn't be relied on to sterilize water' is correct.

One of the usage of 'to + infinitive' is to express a purpose.
to + infinitive 一個用法是表示行動目的

rely on 是一組字，不是 on sterilizing，句子是被動式，意思是
We should not rely on alcohol to sterilize water.

英文對錯不決定於是否順口， 如果要用 sterilizing，on 後必需有另一個 preposition.

Alcohol shouldn't be relied on for sterilizing water.

I thought the same at first that 'forms' should be 'foams'. But then in http://www.thefreedictionary.com/form , I found : form - (Chiefly British) A long seat; a bench. So both foams and forms are meaningful here.

Thanks for the comment.

2014-04-25 21:16:11 補充：
Garlic is such a wise plant. lol

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僰偅偈僳唐呦卅可

I thought the same at first that 'forms' should be 'foams'. But then in http://www.thefreedictionary.com/form , I found : form - (Chiefly British) A long seat; a bench. So both foams and forms are meaningful here.

1.
forms 應該就不是樓上所說的什麼 structural 了，而應該是指「矮矮的、無背的板凳」（這個意思是英式英文），故此 sit on forms 是解「坐在板凳上」

2.
查過字典，沒有 bound out 這個 phrase。out 可能只是純粹用來把動作描述得更生動：bounding（撲）、bounding out（撲出）。

3.
其實兩句都文法正確，但我會認為 a 比較好。一來，preposition 後面用 ing form 很常見，二來，on 後面又有 to 的話，讀起來很不順，聽起來還會像 onto。

不過，如果是分句，只有 b 會是意思正確的：
To sterilize water, alcohol shouldn't be relied on.

a 的意思會變成「不應依賴能把水消毒的酒精。」
Sterilizing water, alcohol shouldn't be relied on.


希望幫到你。

(1)sit on forms can be building forms; be structure forms.
(2)If bounding out is a phrase, then it means hurdling, jumping, leaping towards us .
(3)(a) usage as a greund.
(3)(b) usage as an infinitive.