Because he was ill, he couldn't go to school. → Because of _____________________________________.

Ngọc Anh

$-$ Because of his illness, he couldn't go to school.

$***$ Gthich:

$-$ Cấu trúc biến đổi chỉ nguyên nhân:$Because + S + V \rightarrow Because\ of + Noun / V-ing$

$-$ Biến đổi cụm "he was ill":

$+$ Cách 1 (Dùng Danh từ):

$--$ Chuyển chủ ngữ he thành sở hữu his, tính từ ill thành danh từ illness $\rightarrow$ his illness.

$+$ Cách 2 (Dùng V-ing): Động từ tobe was chuyển thành being $\rightarrow$ being ill.

#$TraChanh$