Question!!

have sth done 意為“請別人做某事”

Eg.

We had the machine mended just now.
我們剛才請人把機器修好了。

He has had his hair cut.
他請人給他理髮了。

The patient is going to have his temperature taken.
這位病人準備請人給他量體溫。


>而你發問的兩句的正確版本應為:

I will have my eyebrow cut.
他將會請人給他理髮。

注意句首的noun要與句後的pronoun吻合，句首用了I，
後面就必定為my， 不可能是其他pronoun，因這句式只針對一個人

I could hardly enter the room without having my hears covered
若果不把我的耳朵掩蓋，我幾乎不能夠進入房間

2013-01-11 19:43:55 補充：
have sth pp & having sth pp 是同一句式，

I could hardly enter the room without having my hears covered.

這句中enter是verb而中間沒有conjunction，
一句中不能同時存在2個verb，
加上without是preposition，
所以後面用having

2013-01-12 18:28:56 補充：
I could hardly enter the room without having my ears covered.
若不請人為我掩蓋耳朵，我幾乎不能夠進入房間。
呢句咁譯唔係好make sense, 似乎你建議既句子較為適合,
"我"應該用自己雙手掩蓋自己既耳朵, 而唔應該係請人為我掩蓋耳朵,
I could hardly enter the room without having covered my ears.
若不掩蓋我的耳朵，我幾乎不能夠進入房間。
( having done sth =自身發出動作)

2013-01-12 18:29:49 補充：
I will have my eyebrow cut.
我將會請人給我修剪眉毛。