英语问题1、训练某个东西是 train for sth. 还是 train of sth. 2、是 be busy do

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英语问题
1、训练某个东西是 train for sth. 还是 train of sth.
2、是 be busy doing sth. 还是 be busy to do sth.
3、

1、训练某个东西 train sth or somebody.
e.g.He trained the monkey to perform some tricks.
他训练猴子玩杂耍.
2.be busy doing sth
e.g.He is busy doing his homework.
他忙於做功课.

是be busy doing sth还是be busy to do sth? 是busy doing sth.还是busy to do sth. be afraid of 是doing sth还是do sth 以sth而著名是be well-know of sth.还是be well-know for make a plan是of sth 还是for sth 英语语法问题!知道者快来!到底是be no use (to) do sth还是be no use dong sth 是It's wrong of sb to do sth 还是It's wrong for sb to do sth 到底是It's wrong of sb to do sth还是I's wrong for sb to do sth? be afraid of doing sth be busy doing sth be glad to do buy s 英语固定词组1,need sb 是do sth 还是 to do sth2,help sb 是do sth 还是 to busy doing sth还是 busy to do sth 请问是be pleased to do sth还是be pleased with sth