appreciate/ ə'priːʃɪeɪt /

1.vt.
(like,value) 欣赏

2.vt.
(be grateful for) 感谢

3.vt.
(understand,be aware of) 理解

4.vi.[currency] [ shares] [ property etc+] 
(increase in value) 涨价

I (really) appreciate your help
我(十分)感谢你的帮助
I appreciate that...
我意识到…
I'd appreciate it if...
如蒙…我将不胜感激