since: Trees can't grow since the soil is contaminated

since có cấu trúc giống và cách dùng như because: since/because+mệnh đề

as: The soil is containminated, as a result, trees can't grow

Cấu trúc: <mệnh đề chỉ nguyên nhân>, as a result, <mệnh đề chỉ kết quả>

because of: Because of the contaminated soil, trees can't grow

due to: Trees can't grow due to the contaminated soil.

due to có cấu trúc giống và cách dùng như because of: due to/because of+N/N phrase