facebook - FQL NOW()+1HOUR の実行方法

Question

これが私のFQLです：

$fql = 'SELECT eid FROM event WHERE eid IN (...) AND start_time>now()'

次のようなものが欲しい...

$fql = 'SELECT eid FROM event WHERE eid IN (...) AND start_time-1hour>now()'

また...

$fql = 'SELECT eid FROM event WHERE eid IN (...) AND start_time>now()+1hour'