Hello Ms 'greenbean'. First of all, while it's up to you how you capitalise - or even punctuate ;) - your username, it IS essential to use capital letters at the beginning of sentences. Also note that the pronoun 'I' is always upper case. Lower case letters are not an option. This is what your post should look like: [They say it's incorrect to say "I recommend her to speak to a lawyer", but you can say " I recommend you to book the flight early". Is it true? I'm confused. ] Now for the answer. Strictly speaking, both sentences are grammatically incorrect. 'Recommend' should not take an indirect object in the way that 'tell' or 'advise' does. You can say "I told her to speak to a lawyer" or "I advised her to speak to a lawyer", but not "I recommend her to speak to a lawyer". You can say this: "I recommend (that) she speak to a lawyer" NB This is a subjunctive mood ( not a typo!). Hence the lack of 's' on the verb. You could also use a gerund: "I recommend speaking to a lawyer" Can you say "I recommend you to book the flight early" ? No, not really. It should be "I recommend you book the flight early." This is also a subjunctive, but it looks identical to the indicative mood. However......If you said or wrote either of those sentences in the real world, you would be understood, and most people would probably not realise that there was anything wrong. In fact, many native speakers use 'recommend' in this way. It's important to know the correct form for a grammar exam, formal letter or document, but in everyday contexts the incorrect form would probably go unnoticed. But we do notice when people don't use capital letters!