if从句的3种不同时态造句如下:现在时: If I go to school now, I should not be late. 如果我现在就去学校,应该不会迟到。 If I want to go with you, will you take me with you? 如果我也想跟你一起去,你会带上我吗?过去时: If I had finished my homework yesterday, I cou...
当if 表示“如果”时,可以分为两种情况:第一种是真实性条件状语从句,遵循“主将从现”的原则。这意味着主句使用将来时态,而if引导的条件状语从句使用一般现在时态来表示将来动作。例如:If it doesn't rain tomorrow, I will go shopping with my friends。第二种情况是虚拟性条件状语从句,这种情...
1,if条件从句是谓语用动词过去式,则后面的主句是情态动词加动词原形 例:If I came tomorrow ,we would have the meeting.2,if条件从句是were to形式,则后面的主句也是情态动词加动词原形 例:If it were to rain tomorrow ,the meting would be put off.3,if条件从句是should do形式,则后面的...
例如,“If I had been feeling well, I would have been in class.” 在这个句子中,如果我当时感觉良好(从句,过去完成时),那么我就会去上课(主句,情态动词+现在完成时,表达虚拟语气)。综上所述,if的条件状语从句的三种用法分别针对将来、当下和过去的情况,通过不同的时态和语气结构来表达...
例句:If it rains, I will stay at home. = I will stay at home if it rains.主句含有情态动词,从句为一般现在时:解释:当主句中含有情态动词时,从句通常使用一般现在时。这种结构用于表达基于某种条件可能产生的结果或建议。例句:If you drive too fast, you may have an accident. = You...