可以“object to do sth." object的用法多数是 object to sth 或 object to doing sth但可以 object to do sth 有哪个英语语法高手可以答我?

可以“object to do sth. object的用法多数是 object to sth 或 object to doing sth但可以 object to do sth 有哪个英语语法高手可以答我? object的用法有object sb to do sth这个词组 吗? object to sth=oppose doing sth , object to doing 还是object to do 还是object doing?! introduce sb to do sth 可以吗 How to do sth可以独立成句吗? teach sth.还是 teach to do sth.抑或teach do sth.,to可以不加吗即TEACH SB.DO STH. do sth to do risk to do risk doing,risk sth to do sth都可以那risk to do sth it use for sb to do sth为什么可以it + 动词+ for sb to do sth? 有object to sb doing sth 这个用法么?就是反对某人去做某事.object to doing sth 反对做某事 知道有这个句型,反对某人 可以用上面的用法? threaten to do sth 的 to 前面可以加 sb encourage sb to do sth 中的to可以省略吗 assist sb to do sth中to可以去掉么? dare to do sth.中的to可以省略吗? help sb (to) do sth中的sb可以省略吗?也就是说有help to do ,help do help to do sth和help do sth let sb to do sth 和 let sb do sth 都可以吗 have sth to do