請教兩句英文 (為何可以這樣縮寫) 感謝 ~~~

以下為一篇出租啟事 : One room in a two-bedroom apt is available now. Great location (3717 Chestnut Street, Philadelphia): next to I-house, WAWA... show more 以下為一篇出租啟事 :


One room in a two-bedroom apt is available now.


Great location (3717 Chestnut Street, Philadelphia): next to I-house,
WAWA (<5 min walk), Fresh Grocer (<10 min walk); near subway
stations (blue line, Trolley), bus stops (route 21, 69);
in University City (UPenn)


Rent is $415/month, all utilities included.


My roommate is a laid-back kind of guy who has a full-time job at UPenn.


If interested, please email: XXX@XXXXXXXXXXXXX


請問 : 
(1) Rent is $415/month, all utilities included.


all utilities included 為什麼句型的省略? all utilities are included? 為何可以這樣省略?


(2) If interested, please email: XXX@XXXXXXXXXXXXX


If interested 為什麼句型的省略? If you are interested? 為何可以這樣省略? 是因為後面祈使句的主詞是you嗎?



感謝大家的回答!!
1 answer 1