Question

はるきもち^ ^

英語　英文解釈
この時のwhenはどういう役割で使われてますか？

第2文
It is not easy resisting the temptation (to drink and smoke)
[resis
SV C
S
when, wherever you turn>, advertising companies are using big money
M
S
V
O
1+1+/50
,<trying to attract us to their products>
}
M ( 分詞構文 )