He comes back.I'll tell you at once.改为条件状语从句 格式：I ___ ___ you at once ___ he comes back
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Hecomesback.I''lltellyouatonce.改为条件状语从句格式：I______youatonce___hecomesbackHecomesback.I''lltellyouatonce
He comes back.I'll tell you at once.改为条件状语从句 格式：I ___ ___ you at once ___ he comes back
He comes back.I'll tell you at once.改为条件状语从句 格式：I ___ ___ you at once ___ he comes back
He comes back.I'll tell you at once.改为条件状语从句 格式：I ___ ___ you at once ___ he comes back
will tell when
will tell if
will tell if
条件状语从句，主句将来时，从句一般选择时