Summer is the hottest of the four seasons.（写出同义句）Summer is -

Summer is the hottest of the four seasons。（写出同义句）Summer is hotter than the other three seasons。John runs fast。Tom doesn't run fast。(合并成一句)Tom doesn't run as fast as John。The boy is too weak to do the work。(写出同义句)The boy isn't strong enough to do the work。