not可以放在seem的後面嗎？

1. Why didn't you turn up the heater?
turn on/off the heater 打開/關閉暖氣機(電源)
turn up/down the heater 調高/調低暖氣機恆溫器
所以本句的"turn up"並無錯誤.
這裡有個英文母語人士對相同主題的討論串:
http://www.dslreports.com/forum/r21045858-Do-you-turn-up-AC-or-Turn-Down-AC-to-make-it-colder
2. I tried, but it seemed not to work.
seem是連綴動詞, 後接主詞補語. not to work是不定詞to work的否定式, 本句seemed not to work的寫法沒有錯誤.
I tried, but it didn't seem to work.
這樣寫也是正確的, 意思與上一句類似, 但在文法上didn't seem是動詞seemed的否定式.
這兩種寫法中的to work都可以替換為分詞working, 意思不變.

2009-02-18 12:16:32 補充：
同樣的, not working 是 working的否定式.

　就我所知， 有一些動詞後面接不定詞to 如有:want, ask, tell, hope, learn, try, decide, forget, remember, like ,love, stop, go, come等。

否定形式時，是在不定式to 前直接加not,即not to do sth.。例如:

　　Teachers ask their students not to speak foul language.
我想seem應該也是這樣。

至於那兩句，要看not所放的位置，一般說來放在那裡就是否定後面的那個詞。

I tried, but it seemed not to work.它好像不能運作。
I tried, but it didn't seem to work.它不像是可以運作。


我想在此意思應該是相同的，不過是翻譯上會有點不同。

2009-02-18 12:00:03 補充：
同意第一位大大所言 通常打開電器類用turn on/ switch on 關閉用turn off/ switch off

1. 如果沒記錯第一句應該是Why didn't you turn 「on」the heater? 因為turn up是「出現、發生」的意思，turn on才是「打開(開關)」的意思喔。

2. 第二句兩種說法都okay，但it seemed not to work是比較常用的，所以可以改成it didn't seem to work，而不是你所說的didn't seem 改成seemed not..喔。另外還有一個常用的寫法就是it seemed not working喔，意思都是一樣的。