Correct

何以

/ héyǐ / 
Strokes

Definition

(literary) why/how

Example

As an Adverb

how; with what

1
Gàn
干
xià
下
cǐ
此
děng
等
gòudàng
勾当
  
,
héyǐ
何以
miànduì
面对
guórén
国人
  
?

Now that you've got involved in such a dirty deal, how can you face your folks?

2
Héyǐ
何以
zìyuánqíshuō
自圆其说
  
?

How can you explain yourself?

As an Adverb

why; for what reason

3
Héyǐ
何以
zìshíqíyán
自食其言
  
?

Why do you go back on your own promise?

4
Héyǐ
何以
jiàn
见
dé
得
  
?

What makes you think so?