“他是否經(jīng)常上學(xué)遲到”用英語說

都是對的，
側(cè)重點不一樣
How
often
is
he
late
for
school----------側(cè)重
“經(jīng)?！边@個詞
Is[does]
she
often
late
for
school
----側(cè)重“是否”

Is
he
often
late
for
school?does不可以。
How
often
is
he
late
for
school？是他多久遲到一次，是頻率

How
often
is
he
late
for
school?
不是問“他是否經(jīng)常上學(xué)遲到”，而是問他遲到的頻率，比我可以答他三天就遲到一次等等。

Is she
often
late
for
school
?才是問“他是否經(jīng)常上學(xué)遲到”。

兩者的句意差別很大的。