中古汉语的语法跟上古汉语的语法比,有哪些不同?

Papers from the macro and micro two aspects of medieval Chinese object prepositions study is forecasted, macro problem is how verbs grammaticalization become prepositions, micro question is which is directly by the verb objects prepositions grammaticalization comes? What object prepositions are from other categories of preposition expansion? The problem is additional:
Middle Chinese object prepositions research prospects
Pick to: papers from the macroscopic and microscopic aspects of medieval Chinese object prepositions study is forecasted, macro problem is how verbs grammaticalization become prepositions, micro question is which is directly by the verb objects prepositions grammaticalization comes? What object prepositions are from other categories of preposition expansion?
Keywords: macro, Micro; Object prepositions

macro与micro中文常用翻译为「宏观与微观」或「总体与个体」,顾名思义,macro所讨论的对象是整个经济体或一大群人/个体的集合,影响层面较深远广泛,变因也较多；micro目标则较小,只限个人或单一企业或机构.
介词:preposition
语法化:Grammaticalize

中古汉语有平、上、去、入四个声调,到现代汉语演变成平、上、去、入四个声调,主要发生了“平分阴阳”“浊上变去”“入派四声”三种音变.
1、平分阴阳：指中古汉语的平声调在现代汉语中分化成阴平、阳平两个声调,分化的条件是声母的清浊：古代的清声母平声字演变成阴平,如“高”“天”“风”“帮”“中”“知”,中古浊声母平声字演变成阳平,如“红”“农”“来”“旁”“泥”“牛”等.
2、浊上变去：此处“浊”指全浊声母,包括“并”“奉”“定”“从”“邪”“床”“禅”“群”“匣”等声母,“去”指去声.所谓“浊上变去”指中古的全浊上声字的声调在现代汉语中演变成去声.如“抱”“厚”“鲍”“上”“伴”.
3、入派四声：指古代汉语的入声在现代汉语分别演变成阴、阳、上、去四声.其中全浊入声字变阳平,次浊入声字变去声,清声母入声字规律性不强,四声都有.

古代汉语的连谓句中,两个谓词中间经常加进“而”,除了你举的例子外,还有“战而胜之”“学而时习之”等.
现代汉语的连谓句中间一般不加连词.