do the work是加ourself还是by ourself,为什么?

do the work是加ourself还是by ourself,为什么? 这句英文语法对吗But we do the mechanical engineering including reverse engineering and inspection by ourself. 这句英文 语法对吗But we do the mechanical engineering including reverse engineering and inspection by ourself. 这句语法对吗But we do the mechanical engineering including reverse engineering and inspection by ourself. do work 这句话是对的吗?如果对的话为什么不冠词a,the,或在work后加s 1 do heavy work | 2 do the dull jobs1 work后为何不加s2 为何加the ? job后为何加s? 是by ourself还是by ourselves? 是go tu work对还是go to the work对是How do you go to work？对还是How do you go to the work？对 We can do the work work in the factory work in in the factory 那个对的?work是不及物要加in吗? do hard work还是do the hard work he ___(do) the work this afternoon是用will do 还是 did We can't work out the physics problem.Can you tell us----------?A.how to do B.waht to do it C.how to do itD.what should to do 为什么不选A,看讲解是what可做do的宾语.how不可做do的宾语,因此需加代词it.（但是看不懂啊,为什 In the work,please do not disturb He has much time__(do)the work. please tell him____(not do)the work what time ______his fither_______(do) the work they_________(自告奋勇)do the hard work