It is precisely this kind of conversation that is of importance .這是強調(diào)句,強調(diào)主語this kind of conversation .
of importance =important
“(be)of+抽象名詞可用其同根形容詞 valuable、useful、helpful、different、important 等替換,:The dictionary is of help to us.=The dictionary is helpful to us.
when引導(dǎo)的是時間狀語從句.主句是 when we are seeking to develop our reading .
to meet the new demands 是當(dāng)目的狀語
being place upon us 是現(xiàn)在分詞的被動式當(dāng)the new demands 的定語.
by studying at a higher level.當(dāng)方式狀語