despite admiring his courage, i think he is foolish ( even though ) => however friendly he seems, he's not to be trusted ( friendly as ) => although she was ill, she went to school. ( in spite of) => he didn't come because he was sick ( because of ) => she didn't eat much though she was hungry ( despite ) =>

despite admiring his courage, i think he is foolish ( even though )

=> Even though I admire his courage , I think he is footish.

Cấu trúc : Although/though/even though + S +V ...

however friendly he seems, he's not to be trusted ( friendly as )

=> Friendly as he may seem , he's not to trusted.

Cấu trúc:  Adj/ adv + as/ though + S + V, mệnh đề

     = However + adj/ adv + S + V, mệnh đề

although she was ill, she went to school. ( in spite of)

=> In spite of her illness , she went to school.

Cấu trúc: Despite/In spite of + N/V ing

he didn't come because he was sick ( because of )

=>Because of his sickness , he didn't come .

Cấu trúc: Because of /Due to/ As a result of + N/V ing 

she didn't eat much though she was hungry ( despite )

=>Despite being hungry , she didn't eat much.

Cấu trúc : Despite/In spite of + N/V ing