一般现在时的定义公式举例

一般现在时表示习惯性动作,真理,是过去、现在和未来都会发生的事情.一般现在时一般与频率副词often,always,sometimes,never,frequently,rarely,ever等连用.
Helen never writes to her brother Tony.She sometimes rings him.
频率副词往往放在句子中的实义动词前,非实义动词后；如果既有实义动词又有非实义动词,要放在两个之间；疑问句中副词往往放在主语后面.在否定句中not必须放在always之前,而且也出现在generally、normally、often、regularly和usually之前；not必须出现在sometimes和frequently之后.表示肯定的速记可以用在句尾；在特别强调和需要对比时,frequently、generally、normally、sometimes、usually等副词可用于句首.
I get paid on Friday usually.
Very often the phone rings when I’m in bath.
非实义动词 :
① 系动词(be)
② 帮助动词构成时态的助动词(do,does,will,shall,have,had,has)
③ 情态动词(must,can,may) 除此之外都是实义动词.
I frequently go to bed hungry.（形容词作状语）
He went to school hungry.饿着肚子上学.
You must come here hungry.空腹来这里.