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...
if 有“是否”和“如果”两种含义。作为“是否”的引导词时,通常引导宾语从句,时态根据时间状语来决定。例如:I don't know if he will come tomorrow。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...
以下是由if引导的条件状语从句的例句:If I have time, I will go to the gym.解释:如果我有时间,我会去健身房。这是一个简单的条件状语从句,表示“如果”某个条件成立,那么主句就会执行。If it rains tomorrow, we will stay indoors.解释:如果明天下雨,我们会呆在室内。这里“if”引导了...
1、My mother asked me if I wanted anything to drink.我妈妈问我是否要喝点什么。2、He didn't know if he was right.他不知道他是否正确。3、I asked her if she was happy.我问她是否她是开心的。if引导宾语从句的用法 表示“是否”:此时用来引导宾语从句,if引导宾语从句时不能作介词宾...
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...