您这些问题主要是一般过去时态和现在完成时.
这些句子中有一些是一样的,如：
was think,was rain,was get,was run--------没有这么用的.
be+现在分词---be+v-ing
was thinking,was raining, was getting.
或
be+过去分词,---be+v-ed【不规则的除外】
也不是所有动词都有过去分词,如
rain【下雨】
-------以下句子正确---------
everyday i thought about XXX
i have never met him before.
it rained heavily during the night
she got so angry that she ran after them.
i bought a car last yea